Ok, So I got two problems I have no clue how to do or finish the first I got far on....

First

f(x) = 1/x+7

f(x+h) = 1/(x+h)+7

My work...

[ 1/(x+h)+7 ] - [ 1/x+7 ]

_____________________

h/1

Skip few steps.... Then

1(x+7) - (x+h)+7 / h [(x+h)+7](x+70

Dont know where to go from there.....

Second problem have no clue where to start or finish...

f(x) = Square Root of x+7

Help would be very appreciated!