Question

7. If xº = 405° and yº =
find x and y.
12​

Answer 1

7. Find the critical points of f(x, y)= yº – xº +15x – 12 y+12 and use the Second Derivative Test to classify them. If the test fails, say “the test fails.” 8. Find the critical points of f(x, y)= 2 xy - x – 2y +6x+4 and use the Second Derivative Test to classify them. If the test fails, say “the test fails.” 9. Find the critical points of f(x, y)= y2 – 4 In(x)+4 x and use the Second Derivative Test to classify them. If the test fails, say “the test fails.”