f(x) = 5x^3 - 6x + 8 f ' (x) =
Follow Math Help Forum on Facebook and Google+
f'(x) = limit as h approaches 0 of Can you solve it now?
5(x+h)^3-6(x+h)+8-(5x^3-6x+8)/h = 5x^3+5h^3-6x+6h+8-5x^3+6x-8/h = 5h^3+6h/h = h(5^3+6)/h = 131
Looks good to me.
I put this in and its coming up wrong, can u help me find where i went wrong
Ok let me walk you through it. So plug in to get: Now use your factoring skills: Becomes: Combine like terms: Factor out an : As approaches 0, so do and , so we have that:
View Tag Cloud