Question

if A=[-1,2] then find -A​

Answer 1

-A= [ +I, -2 ] { I think this is the answer}

Answer 2

f(x)=3x−2

(gof)

−1

=x−2

Let y=x−2⇒x=2+y⇒y

−1

=2+x

⇒((gof)

−1

)

−1

=2+x

⇒g

f

˙

=2+x

⇒g(f(x))=x+2

⇒g(3x−2)=3x−2+2=3x

Let 3x−2=t⇒x=

3

t+2

g(t)=

3

t+2

+2

g(t)=

2

t+8

∴g(x)=

3

x+8