Before differentiating the function

MATHEMATICS · Single correct · GCSE · Mathematics · Algebra · Algebra

Problem

f(x)=\dfrac{2x+3}{x^{2}-1}

, which value(s) of

x

must be excluded from its domain? (a)

x=1

only (b)

x=-\dfrac{3}{2}

(c)

x=\pm 1

(d)

x=-1

only