Question

F(x) = 7x-4 g(x)=2x/x-3, x ≠3 find fg(4)

Answer 1

Answer:

Given,

$f(x) = 7x - 4 \\ g(x) = \frac{2x}{x - 3} \: \: \: \: \: \{ \: x \neq3 \: \} \\ fog(4) = \: to \: find \: \\ now \\ \\ fog(4) \\ = f(g(4)) \\ = f( \frac{2 \times 4}{4 - 3} ) \\ = f(8) \\ = 7 \times 8 - 4 \\ = 56 - 4 \\ = 52$