State the largest value of $$$k$$$ possible for the composition fg to be defined. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

Mathematics

IGCSE&ALevel

CAIE

Exam No：9709_m20_qp_12 Year：2020 Question No：9(d)

Answer:

(Largest
is) $-\frac{1}{2}$

1.2.1 understand the terms function, domain, range, one-one function, inverse function and composition of functions