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diketahui:
f( x) = px+q
f(-2) =-8
f( 5) = 15
ditanyakan:
p&q = ?
penyelesaian
f(-2) = -2p+q = -8
f( 5) = 5p+q = 15
__________ __
-7p =-23
p =-23/-7
p =3,3
f(-2) =-2p+q =-8
=-2(3,3)+q =-8
=-6,6+q =-8
=q =-8+6,6
=q =1,4