Question

Fungsi f di tentukan oleh f(x)=a x +bjika pasangan - pasangan berurutan (p-3)(-3,q),(r,2),(2,-2) adalah anggota dari fungsi itu , nilai p dan r adalah...

Answer 1

F (2) = 2a + b = -2
f (-2) = -2a + b = 6 —
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<====> 4a = -8
<====> a = -8/4
<====> a = -2

-4 + b = -2
b = -2 + 4
b = 2

» Rumus
f (x) = -2x + 2

» Nilai r
f (r) = -2r + 2 = 2
<===> -2r = 2 - 2
<===> -2r = 0
<===> r = 0 (tidak terdefinisikan)

» Nilai q
f (-3) = -2.(-3) + 2 = q
<====> 6 + 2 = q
<====> 8 = q

» Nilai p
f (p) = -2p + 2 = -3
<===> -2p = -3 - 2
<===> -2p = -5
<===> p = -5/-2
<===> p = 2,5