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Questão 24. (ITA - 1997) Seja S o conjunto de todas as soluções reais da equação 1 5 sec arctg arctg 1 e . 21 e A ( ) S . B ( ) S . C ( ) S 1,2 ...

Questão 24. (ITA - 1997) Seja S o conjunto de todas as soluções reais da equação 1 5 sec arctg arctg 1 e . 21 e A ( ) S . B ( ) S . C ( ) S 1,2 . D ( ) S 1,1 . E ( ) S 1,2 .

A ( ) S .
B ( ) S .
C ( ) S 1,2 .
D ( ) S 1,1 .
E ( ) S 1,2 .

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Lista 1_ Funções Circulares Inversas
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Para resolver essa questão, podemos utilizar algumas propriedades trigonométricas. Primeiramente, vamos observar que: arctg(1) = π/4 sec(π/4) = √2 Substituindo esses valores na equação, temos: 1 + 5√2 = 21e^(arctg(1) + arctg(1/5)) Podemos utilizar a propriedade trigonométrica que diz que: arctg(x) + arctg(1/x) = π/2 Substituindo x = 5, temos: arctg(5) + arctg(1/5) = π/2 e^(arctg(5) + arctg(1/5)) = e^(π/2) = i Portanto, temos: 1 + 5√2 = 21i Para encontrar as soluções reais dessa equação, podemos escrever i na forma trigonométrica: i = cos(π/2) + i sen(π/2) i = 0 + i.1 i = i Substituindo i na equação, temos: 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i 1 + 5√2 = 21i

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