Homework Statement
calculate the derivative of the following functions?
f(x,y,z,t) = (x-1)(2-y)z + (t^3 - 1)xyz
g(x,y) = 1/(1 + exp(-(ax + by + c))
h(x,y,z) = (x-1)^2 exp(x) + (y-2)^3 * z^3
The Attempt at a Solution
the way i was thinking was may be split the problem into...