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-2a+b=11
h(1)=a(1)+b=2
a=b=2
-2a+b=11
a+b=2
------------------- -
-3a=9
a=9/-3
a=-3
subtitusikan ke pers 1 atau 2
a+b=2
(-3)+b=2
b=2+3
b=5
jadi h(5)=a(5)+b
(-3)(5)+5=-10
f(1) =2
f(-2)= -2x + b =11
f(-1) = 2x +b = 1 _
= -10
b= ax + b+ -2(-10) + b) =11
20+b = 11
b=20-11 = 9
f(5) = -10(-2) + 9 = 29