6. (10 points) Let ƒ be a differentiable function with f(1) = 9. Find the tangent plane of the surface z = xf
at the point (1, 1, 9).
阿摩線上測驗
登入
阿摩線上測驗
登入
6. (10 points) Let ƒ be a differentiable function with f(1) = 9. Find the tangent plane of the surface z = xfat the point (1, 1, 9).