Let . Answer the following…

MATHEMATICS · Multi-part · A Level · Mathematics · Differentiation · Differentiation

Problem

Let

f(x)=3x^4-4x^2+5x^4-7

. Answer the following questions. (i) Simplify the expression for

f(x)

by combining like terms. (ii) Find

\dfrac{df}{dx}

for the simplified form of

f(x)

. (iii) Evaluate

\dfrac{df}{dx}

x=1

. Express your answer as an integer.