Geral
CALCULO-II
Semana 7
0

Questão

Considerando a função g(x,y)=x33xy2g(x,y)=x3−3xy2g(x,y) = x^{3} - 3xy^{2}, assinale a alternativa que apresenta as coordenadas dos seus pontos críticos.

A) (0, 0) e (1, 1)(0, 0) e (1, 1)(0,\ 0)\ e\ (1,\ 1)
B) (0, 0)(0, 0)(0,\ 0)
C) (0, 0) e (1, 1)(0, 0) e (1, −1)(0,\ 0)\ e\ (1,\ - 1)
D) (1, 1) e (1, 1)(1, 1) e (−1, −1)(1,\ 1)\ e\ ( - 1,\ - 1)
E) (0, 0) e (1, 1)(0, 0) e (−1, 1)(0,\ 0)\ e\ ( - 1,\ 1)
function vote(questaoId, value) { window.location.href = "/accounts/login/?next=/questao/2280/"; return; fetch(`/vote/questao/${questaoId}/`, { method: 'POST', headers: { 'Content-Type': 'application/json', 'X-CSRFToken': 'IHNH5xUxosfPr8jv8yJQBXkAzX8JnVr2LRQWDwksU06XV2yZq605n35anTpUTeZs' }, body: JSON.stringify({ value: value }) }) .then(response => response.json()) .then(data => { if (data.success) { document.getElementById(`score-${questaoId}`).textContent = data.score; const upBtn = document.querySelector(`button[onclick="vote(${questaoId}, 1)"]`); const downBtn = document.querySelector(`button[onclick="vote(${questaoId}, -1)"]`); upBtn.classList.remove('active-up'); downBtn.classList.remove('active-down'); if (data.user_vote === 1) upBtn.classList.add('active-up'); if (data.user_vote === -1) downBtn.classList.add('active-down'); } }); }