Question

Find f*g and its domain.

Answer 1

\[f(x)=3x+2 \]
\[g(x)=7x=6\]

Answer 2

Is it (f×g)(x) or (fºg)(x) ?

Answer 3

IT is fog, right ?

Answer 4

f*g

Answer 5

i assume its f(x)*g(x)

Answer 6

I got \[21x^2+32x+12\] but I don't know the domain.

Answer 7

what does * represent, multiplication symbol, or the symbol of º.
I want to know if it is ` (f × g) (x) ` or `(f º g) (x) ` .

Answer 8

Muliplication, sorry

Answer 9

*multiplication

Answer 10

Okay I'll show both.
\(\normalsize\color{blue}{ f(x)=3x+2\LARGE\color{white}{ \rm │ }}\)
\(\normalsize\color{blue}{ f(x)=7x+6\LARGE\color{white}{ \rm │ }}\)

\(\normalsize\color{blue}{ f(x)\times g(x)=(3x+2)(7x+6)=21x^2+32x+12\LARGE\color{white}{ \rm │ }}\)

Answer 11

domain must be common to both functions, so wherever the domains overlap will be the common domain.

Answer 12

The domain is not restricted. All real nums.

Answer 13

OK, thanks :D

Answer 14

yep, j'ai d'accord!