Question

I need help on how to do this PLEASE HELP
Write the composition of the functions given.
Given: f(x) = 2x+7 g(x) = x^2 h(x) = x-1

How do you do f(g(x))

Answer 1

f(g(x)) means that the x in f(x) becomes g(x). In other words, you just plug in g(x) whereever you have an x in f(x).

For example, f(h(x)) would be 2(x-1) +7 since f(x) is 2x+7 and h(x) is x-1

Answer 2

So basically you just put the first number of the letter in and then finish off the problem with the remaining numbers? ohh okay i think i get it. so it would be like 2(x+7)^2?

Answer 3

Not quite

Answer 4

g(x) = x^2

f(x) = 2x + 7

So, put g(x) in where there is an x in f(x).

The only x in f(x) is next to the 2.

So it would look like this,

2 {x^2} + 7

See that x^2 is now the new x? In { }'s ?

So, simply by taking away the brackets. It's just 2x^2 + 7

Answer 5

ohhh okay thank you so much.:) & im sorry im a very slow learner.

Answer 6

It's ok, that's why we are all here. To teach and learn. :)