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f(x) = x+1 = -4
f(x) = x2-x-2 sisa .. ?
caranya gunakan pemisalan S (x) = aX+b
X-2 = 0 x+1 = 0
X=2 x= -1
substitusikan
f(x) = x-2
f(2) = 2a+b = 11
f(-1) = -a+b = -4 -
3a = 15
a = 15
3
a= 5
eliminasikan
2a+b = 11
2(5)+b=11
10+b=11
b = 11-10 = 1
karena S(X) dimisalkan aX+b
maka s(x) = 5x+1
selesai deh :)