Question

If y=5x+11 what is the value of (f^-1×f)(-3)

Answer 1

Explanation:

we have, y= 5x+11

interchanging the value of x and y

x= 5y+11

x-11=5y

x-11/5=y

f^-1 = x-11/5

when x=-3

y= 5×(-3)+11

y= -4

now,

f^-1×f(-3) = (x-11/5)× -4

= (-4x +44)/5