Question

(z+7)³ find the answer ​

Answer 1

ANSWER

f(x)=4−(x−7)3

Let y=f(x)

So, x=f−1(y)            ---- ( 1 )

y=f(x)

⇒  y=4−(x−7)3

⇒ (x−7)3=4−y

⇒  x−7=34−y

⇒  x=7+34−y

⇒  f−1(y)=7+34−y  .................. [ From ( 1 ) ]

∴  f−1(x)=7+34−x

Answer 2

Refer the attachment above ..

Identity used :

( a + b )³ = a³ + 3a²b + 3ab² + b³

Hope it Helps !!