Question

1) f (x)=(5x+4)(x-3) / x^2+1, x = 1

2)f (x) = 3x^2 + (x-2)(8-x) / x^2
x = 1

Answer 1

1)F'(x)=(4x³-3x²-x-1)'=4*3x²-3*2x-1=12x²-6x-1
F'(-1)=12*(-1)²-6*(-1)-1=12+6-1=17