darkcat422 darkcat422

13-04-2020
Mathematics

contestada

Let f(x)= -4x-1 and g(x)= x^2+1.
Find (f x g)(7).
(f x g)(7) = __

Let fx 4x1 and gx x21 Find f x g7 f x g7 class=

Respuesta :

Larrysammz Larrysammz

13-04-2020

Answer:

Step-by-step explanation:

Let f(x)= -4x-1 and

g(x)= x^2+1.

(f.g)(x) = (-4x-1)(x²+1)

-4x(x²+1)-1(x²+1)

-4x³-4x-x²-1

(f.g)(x)= -4x³-x²-4x-1

(f.g)(7) =-4(7)³-(7)²-4(7)-1= -4(343)-49-28-1 = -1372-77-1= -1372-78 = -1450

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