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f(3) = p(3) + q f(-2) =p(-2) +q
-10 = 3p + q 0 = -2p +q
lakukan eliminasi
3p + q = -10
-2p + q = 0
___________ -
5p = -10
p = -10 : 5
p = -2
3p + q = -10
3(-2) +q = -10
-6 + q = -10
q = -10 - (-6)
q = -10 + 6
q = -4
f(-7) = px + q
f(-7)= -2(-7) - 4
f(-7)= 14 - 4
f(-7)= 10
f(x) = px + q
f(3) = p(3) + q = -10
f(3) = 3p + q = -10
f(-2) = 0
f(x) = px + q
f(-2) = p(-2) + q =0
f(-2) = -2p + q = 0
3p + q = -10
-2p + q = 0
–––——— –
5p = -10
p = -10 / 5
p = -2
3p + q = -10
3(-2) + q = -10
-6 + q = -10
q = -10 + 6
q = -4
f(-7)
f(x) = px + q
f(-7) = (-2)(-7) + (-4)
f(-7) = 14 - 4
f(-7) = 10