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b) bayangan:
f(2) = 4(2) - 2 = 6
f(-2) = 4(-2) - 2 = - 10
f(4) = 4(4) - 2 = 14
f(-4) = 4(-4) - 2 = - 18
{6,-10,14,-18}
c) f(p) = 8
4p - 2 = 8
4p = 10
p = 10/4
= 5/2