Tolong jawab ya plase buat besok semangat oyyy nomer 6 aja sapa yang tau langsung jawab ok
Matematika
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Pertanyaan
Tolong jawab ya plase buat besok semangat oyyy nomer 6 aja sapa yang tau langsung jawab ok
1 Jawaban
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1. Jawaban Anonyme
Bab Fungsi
Matematika SMP Kelas VIII
6a] f(x) = 1/(x² - 9)
f(1) = 1/(1² - 9)
= 1/(1 - 9)
= 1/(-8)
= -1/8
f(2) = 1/(2² - 9)
= 1/(4 - 9)
= 1/-5
= -1/5
f(0) = 1/(0² - 9)
= 1/-9
= -1/9
6b] f(r) = 1/135
1/(x² - 9) = 1/135
x² - 9 = 135
x² - 9 - 135 = 0
x² - 144 = 0
(x + 12) (x - 12) = 0
x + 12 = 0
x = -12
x - 12 =0
x = 12
jadi, r = -12 atau r = 12