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g(1)=3
1a+b=4
g(3)=16
3a+b=16
1a+b=4
3a+b=16 -
-2a=-12
a=6
1a+b=4
1.6+b=4
b=-2
g(7)
6.7-2
42-2
40
g(2) : a(2) + b = 16
a + b = 4
2a + b = 16 (dikurangi)
: -a = -12 atau a = 12
b = -8
didapat fungsi g(x) = 12a - 8
g(7) : 12 (7) - 8 = 84 - 8 = 76
jadi, nilai g(7) adalah 76