A.4^x-1=16^2x-3 B.7^x²-3x+2=9^x²-3x+2 C.3^x+1=7^2x+4
Matematika
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Pertanyaan
A.4^x-1=16^2x-3
B.7^x²-3x+2=9^x²-3x+2
C.3^x+1=7^2x+4
B.7^x²-3x+2=9^x²-3x+2
C.3^x+1=7^2x+4
1 Jawaban
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1. Jawaban SadonoSukirno
A. 4^(x-1) = (4²)^(2x-3)
4^(x-1) = 4^2(2x-3)
x - 1 = 2(2x - 3)
x - 1 = 4x - 6
-1 + 6 = 4x - x
5 = 3x
x = 5/3
B. 7^(x²-3x+2) = 9^(x²-3x+2)
x² - 3x + 2 = 0
(x - 2)(x - 1) = 0
x = 2 dan x = 1
itu ajah yg tau