QUESTION: Find an equation of the tangent plane to the surface
z=3x^4+9y^4+7xy at the point (3,3,1035).
SOLUTION: Start Calculus Made Easy , go to the Multivariable Calculus in the menu.
There, enter as shown below :


Thus, finally

Step by Step Math & Science & Finance using the TiNspire CX
QUESTION: Find an equation of the tangent plane to the surface
z=3x^4+9y^4+7xy at the point (3,3,1035).
SOLUTION: Start Calculus Made Easy , go to the Multivariable Calculus in the menu.
There, enter as shown below :