suatu fungsi f di nyatakan dgn f(2x-1)= 4x+7 nilai f(-5) adalah A. -5 B.-1 C. 1 D. 5

f(2x-1) = 4x+7
misal 2x-1 = t maka x = t+1 / 2
f(t) = 4(t+1 / 2) + 7
f(t) = 2t+2+7
f(t) = 2t + 9
f(x) = 2x + 9
f(-5) = 2(-5) + 9 = -10 + 9 = -1 (B)
Semoga membantu

Misal:
2x - 1 adalah p

2x-1 = p
2x = p+1
x = (p+1)/2

Jwb:
f(p) = 4((p+1)/2)+7
f(p) = 2(p+1)+7
f(p) = 2p+2+7
f(p) = 2p+9
f(x) = 2x+9

Jadi,
f(-5) = 2x+9
f(-5) = 2(-5)+9
f(-5) = -10+9
f(-5) = -1