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1. The inverse of f(x) =2x-1 is
- A. (x-1)/2
- B. (x-1)/2
- C. (x-1)/2
- D. (x-1)/2
Answer: Option B
Explanation:
Caution: Inverse function (not inverse only)
Formula for inverse function:
1. y = f(x)
=> x => f^-1(y)
2. find x = something
Lets start:
y = f(x) = 2x-1
=> 2x = y+1
=> x = (y+1) / 2
=> f^-1(y) = (y+1) / 2
=> f^-1(x) = (x+1) / 2
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