Define the function by f(x)= cases x+2, & x<1

MATHEMATICS · Single correct · CBSE · Mathematics · Relations and Functions · Relations and Functions

Problem

Define the function

f

f(x)= \begin{cases} x+2, & x<1,\\ x^{2}, & x\ge 1. \end{cases}

Find the set of all preimages of

1

. (a)

\{-1\}

(b)

\{-1,\,2\}

(c)

\{-1,1\}

(d)

\{1\}