Question

Me podrian ayudar con esta pregunta?

Answer 1

f(x+h)= -9(x+h)^2-8(x+h)-2

f(x+h)-f(x)= -9(x+h)^2-8(x+h)-2 - (9x^2-8x-2)

f(x+h)-f(x)/h= -9(x+h)^2-8(x+h)-2 - (9x^2-8x-2)/h

Lim h->0 f(x+h)-f(x)/h= Lim h->0 -9(x+h)^2-8(x+h)-2 - (9x^2-8x-2)/h

df/dx= -18x-8