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h(2) = p(2) +q = 1
= 2p +q = 1
h(4) = p(4) +q = 5
= 4p +q = 5
2p +q = 1
4p +q = 5 -
-2p = -4
p = 2
2p +q = 1
2(2) +q = 1
4 +q = 1
q = 1 -4
q = -3
Maka, rumus fungsinya h(x) = 2x +(-3)
Mencari h(10) ??
h(x) = 2x +(-3)
h(10) = 2(10) +(-3)
= 20 +(-3)
= 17
1=p1+q....(1)
h(4)=px+q
5=p4+q....(2)
*eliminasikan kedua persamaan
1=p1+q
5=p4+q -
-4=-3p
p=4/3
*subtitusi kan p ke persamaan 1
1=p1+q
1=4/3+q
q=1-4/3
q=-1/3
*masukan nilai p dan q, pada h(10)
h(10)=px+q
h=4/3(10)-1/3
h=40/3-1/3
h=39/3
h=13
*jafi nilai pada h(10) = 13