Para calcular o produto vetorial entre u with rightwards arrow on top e v with rightwards arrow on top, precisamos seguir a seguinte fórmula: u with rightwards arrow on top space cross times space v with rightwards arrow on top = (u2v3 - u3v2) with rightwards arrow on top i - (u1v3 - u3v1) with rightwards arrow on top j + (u1v2 - u2v1) with rightwards arrow on top k Substituindo os valores de u with rightwards arrow on top e v with rightwards arrow on top, temos: u with rightwards arrow on top space cross times space v with rightwards arrow on top = (2x7 - 3x5) with rightwards arrow on top i - (1x7 - 3x1) with rightwards arrow on top j + (1x5 - 2x1) with rightwards arrow on top k u with rightwards arrow on top space cross times space v with rightwards arrow on top = (-1) with rightwards arrow on top i - (4) with rightwards arrow on top j + (3) with rightwards arrow on top k Portanto, o vetor w with rightwards arrow on top é igual a (-1) with rightwards arrow on top i - (4) with rightwards arrow on top j + (3) with rightwards arrow on top k. A alternativa correta é a letra B.
Para escrever sua resposta aqui, entre ou crie uma conta
Compartilhar