diketahui rumus fungsi f(x - 2) = 4x - 3. nilai f(-1) adalah.....

jawab

f(x - 2) = 4x - 3

f(-1) = ...
(x -2) = - 1
x = -1 + 2
x = 1

f(-1) = 4(1) - 3
f(-1) = 1

f(x - 2) = 4x - 3

misalkan
y = x - 2
maka
x = y + 2

f(y + 2 - 2) = 4(y + 2) - 3
f(y) = 4y + 8 - 3
f(y) = 4y + 5
f(-1) = 4(-1) + 5
f(-1) = -4 + 5
f(-1) = 1

jadi nilai f(-1) adalah 1