Before solving for the constants

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

Before solving for the constants, which of the following is an appropriate partial–fraction setup for

\dfrac{5x+4}{(x+2)^2}

? (a)

\dfrac{Ax+B}{(x+2)^2}

(b)

\dfrac{A}{x+2}

(c)

\dfrac{A}{x+2}+\dfrac{B}{(x+2)^2}

(d)

\dfrac{A}{(x+2)^3}+\dfrac{B}{(x+2)^2}