f(x) = px + q
f(2) = 2p + q = 5
f(-1) = -p + q = -1
Eliminasi kedua persamaan.
2p + q = 5
-p + q = -1
________--
3p = 6
p = 6/3
p = 2
Substitusi nilai p ke salah satu persamaan.
2(2) + q = 5
4 + q = 5
q = 5 - 4
q = 1
a. Jadi, nilai p dan q adalah 2 dan 1.
b. f(x) = px + q
f(x) = 2x + 1
c. f(x) = 2x + 1
f(5) = 2(5) + 1
= 10 + 1
= 11
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f(x) = px + q
f(2) = 2p + q = 5
f(-1) = -p + q = -1
Eliminasi kedua persamaan.
2p + q = 5
-p + q = -1
________--
3p = 6
p = 6/3
p = 2
Substitusi nilai p ke salah satu persamaan.
2p + q = 5
2(2) + q = 5
4 + q = 5
q = 5 - 4
q = 1
a. Jadi, nilai p dan q adalah 2 dan 1.
b. f(x) = px + q
f(x) = 2x + 1
c. f(x) = 2x + 1
f(5) = 2(5) + 1
= 10 + 1
= 11