suatu fungsi f dinyatakan dengan f(2x-1)=4x+7 nilai f(-5) adalah

f (2x-1) = 4x +7

Cari f(x) terlebih dulu

Misal 2x -1 = a

2x = a +1

x = (a+1)/2

f(a) = 4 (a+1)/2 + 7

f(a) = 2(a+1) +7

f(a) = 2a + 9

f(x) = 2x+9

f(-5) = 2(-5) +9

= -10 +9

= -1