Question

Suatu fungsi f dinyatakan dengan f(2x-3)=4x+5 nilai dari f(-7) adalah

Answer 1

F(2x - 3) = 4x + 5
f (2 . x/2 - 3) = 4 . x/2 + 5
f(x - 3) = 2x + 5
f(x + 3 - 3) = 2(x + 3) + 5
f(x) = 2x + 6 + 5
f(x) = 2x + 11

f(-7) = 2 . (-7) + 11
f(-7) = -14 + 11
f(-7) = - 3