f(x)= 1/x-2

Question

Plug in 1 for x.
I keep getting -1 but the book says the answer is 3. Please help. Thanks

Answer 1

If f(x) = 1/x - 2 , the way you typed it, then
f(1) = 1/1 - 2 = 1-2 = -1

if f(x) = 1/(x-2), then
f(1) = 1/(1-2) = 1/-1 = -1

either way, your book is wrong.