Description: differentiate the functions

1.f(x) =expo(x^2)

2.f(x)= logX / X^3 ; X>0

3.f(x)= X^(-5)

4.f(x)=log(6x); x>0

find the partial deriviatives
1. f(x,y)= log(2X^2) + log(3Y^4); X not equal to 0, Y not equal to 0
2. f(x; y) = exp(3x^4 * y^2)
3. f(x; y) = log(x) exp(y); x > 0
4. f(x; y) = log(x) / y^2 ; x > 0; y not equal to 0

finding the global mzximum for the funcation if it exist

1. f(x)= -X^2
2 f(x) = 4+ 5x – 0.1x^2; x>0