Need help evaluating a function.

[MoShow]

So the book says "For the function f(x)=1/x where x is not equal to 0. Find f(x+h)"

All Ive managed to do Is key in (x+h) for x, which gives f(x+h)=1/(x+h). I cant find my way to the solution.

Help me please.

 

[Ishuda]

So the book says "For the function f(x)=1/x where x is not equal to 0. Find f(x+h)"

All Ive managed to do Is key in (x+h) for x, which gives f(x+h)=1/(x+h). I cant find my way to the solution.

Help me please.

You found it.
f(x) = something
just means, when you want f(blah) just replace the x in the something with blah. So
f(x) = 1/x
f(blah) = 1/blah
blah = x+h
f(x+h)=1/(x+h)

 

[Steven G]

So the book says "For the function f(x)=1/x where x is not equal to 0. Find f(x+h)"

All Ive managed to do Is key in (x+h) for x, which gives f(x+h)=1/(x+h). I cant find my way to the solution.

Help me please.

I think that you are expecting a number? Only when you compute f( a number) will you possibly get a number. Since x+h is NOT a number, then it follows that f(x+h) will not be a number

 

[MoShow]

Understood! Thanks a lot guys, really appreciate it.