Question

What is the inverse of the function f(x) = 2x + 1?

1
h(x) :
-
1
X-
2
2
글을
글자
1
O h(x)
X+
1
2
2
1
h(x) =
= x-2
2
○ h(x) = + 2
h=
1
-x2

Answer 1

The first option ,f^-1(x)=1/2*x-1/2

Explanation:

f(x)=2x+1

y=2x+1

Interchanging the places of x and y, we get,

x=2y+1

(x-1)/2=y

f^-1(x)=(x-1)/2

f^-1(x)=1/2*x-1/2

The first option.