Diketahui f(x)=ax+b jk f(2)=1 dn f(3)=-1, nilai a dan b brtrut trurt...
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F(2) = 2a + b = 1 f(3) = 3a + b = -1 ----------------- - -a = 2 a = -2 f(2) = 2(-2) + b = 1 -4 + b = 1 b = 1 + 4 b = 5
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19newbipro22
F(x) = ax + b f(2) = 1 => 1= 2a+b (pers 1) f(3)=-1 => -1=3a+b (pers 1) ____________ - 2=-1a a=2/-1 a=-2 mencari b dengan cara memasukkan a=-2 ke pers 1 1=2.-2 + b 1=-4 + b 1+4 = b b=5
f(3) = 3a + b = -1
----------------- -
-a = 2
a = -2
f(2) = 2(-2) + b = 1
-4 + b = 1
b = 1 + 4
b = 5
f(2) = 1 => 1= 2a+b (pers 1)
f(3)=-1 => -1=3a+b (pers 1)
____________ -
2=-1a
a=2/-1
a=-2
mencari b dengan cara memasukkan a=-2 ke pers 1
1=2.-2 + b
1=-4 + b
1+4 = b
b=5