hannahbedford12 hannahbedford12

25-04-2018
Mathematics

contestada

What is (g ° f)(2) for f(x) =
10
/x
- 1 and g(x) = 7x – 4?

Respuesta :

MANNYCARRILLO6 MANNYCARRILLO6

25-04-2018

g of f means plug f(x) into g(x)

but we want at x=2

we can solve to ways

1) find g(2)=7x-4
= 10

f(10)= 10 / (x-1)
answer is 10/ 9

method 2 is

(f(g)x)= 10/ ((7x-4)-1)
=10/(7x-5)

now x=2
=10/(7(2)-5)
=10/9

same answer, hope this helps

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