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f(1) = a(1) +b = 7
= a +b = 7
f(3) = a(3) +b = 5
= 3a +b = 5
a +b = 7
3a +b = 5 -
-2a = 2
a = -1
a +b = 7
-1 +b = 7
b = 7 +1
b = 8
f(x) = -x +8
f(0) = -(0) +8
= 8
Itu jawabannya.
f(1) = 7 f(3) = 5
a + b = 7 3a + b = 5
2a + a + b = 5
2a + 7 = 5
2a = -2
a = -1 berarti b = 8
f(0) = -1 (0) + 8
= 8