Suatu fungsi f (x) = 2x + 1 g (x) = 8x – 4 Maka (5f +2g)(x)= A 18x – 3 B 18x + 3 C 26x ‒ 3 D 26x + 3 E 26x + 4

Question

Matematika Diposting : 2017-05-31 Diupdate : 2019-09-10 delviapuni

Pertanyaan

Suatu fungsi f (x) = 2x + 1
g (x) = 8x – 4
Maka (5f +2g)(x)=

A
18x – 3
B
18x + 3
C
26x ‒ 3
D
26x + 3
E
26x + 4

Answer 1

(5f+2g) (x)
= (5.2x+1) + (2.8x-4)
= 10x+5 + 16x-8
= 26x-3

Answer 2

f(x) = 2x + 1
g(x) = 8x - 4

(5f + 2g)(x) = 5(f(x)) + 2(g(x))
= 5(2x + 1) + 2(8x - 4)
= 10x + 5 + 16x - 8
= 26x - 3