tolong kerjain soal ini.. Log (2x-1)+log(x+3)= 1+log3
Matematika
windymeilany1
Pertanyaan
tolong kerjain soal ini..
Log (2x-1)+log(x+3)= 1+log3
Log (2x-1)+log(x+3)= 1+log3
1 Jawaban
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1. Jawaban anggiresti
log (2x-1)(x+3) = log 30
persamaan logaritma
f(x)=p
(2x-1)(x+3)=30
2x²+6x-x-3=30
2x²+5x-33
(x-3)(2x+11)
x-3=0 2x+11=0
x=3 x=-11/2