Question

Help...
let f(x)=2x and g(x)=5-3x.
Find,[a] g(x)-f(x)
[b] f(-1)
[c] g(0)-f(-1).

Answer 1

\( \color{Black}{\Rightarrow g(x) - f(x ) = (5 - 3x) - (2x)}\)

\( \color{Black}{\Rightarrow f(-1) = 2(-1)}\)

\( \color{Black}{\Rightarrow g(0) - f(-1) = (5 - 3(0)) - 2(-1) }\)

Answer 2

The key to solving these problems is substitution. I believe that you could continue all 3 of them.

Answer 3

thanks, but let me try with your example.
i will get back to you.

Answer 4

Sure.

Answer 5

i am clear with that. thanks one more time.