Question

f(x+h)-f(x)
___________
h

I know the answer is 7 but I'm not sure how to get it

Answer 1

opps i forgot to say f(x)=7x

Answer 2

yh, it's 7

Answer 3

but how?

Answer 4

\[f(x)\prime=nx ^{n-1}\]

Answer 5

in this case n=1\[f(x)\prime=nax ^{n-1}\]

Answer 6

a=7

Answer 7

\[\therefore, (1)*7x ^{1-1}=7x ^{0}=7(1)=7\]