suatu fungsi dinyatakan dengan persamaan f (x) = ax + b. Jika f (-2) = - 4 dan f(4) = 32, maka f(8) adalah...

f(-2) = a(-2) + b
-4 = -2a + b

f(4) = a(4) + b
32 = 4a + b

-2a + b = -4
4a + b = 32
....................... –
-6a = -36
a = -36/-6
a = 6

-2a + b = -4
b = -4 + 2a
b = -4 + 2(6)
b = -4 + 12 = 8

f(8) = a(8) + b = 8a + b = 8(6) + 8 = 48 + 8 = 56

009+4466+567-678+667+57=5786786