Решить уравнение применяя определения логарифма
1)log14(3x+16)=2
2)log1/8(1-3x)=-2
3)log1/2(2x-7)=-5
4)log9(x^2+17)=2
1)log14(3x+16)=2
2)log1/8(1-3x)=-2
3)log1/2(2x-7)=-5
4)log9(x^2+17)=2
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Answers & Comments
log14(3x+16)=log14 196
3x+16=196
3x=180
x=60
log1/2(2x-7)=-5
log1/2(2x-7)=log1/2 32
2x-7=32
2x=39
x=19.5
log9(x^2+17)=2
log9(x^2+17)=log9 81
x^2+17=81
x^2=64
x=8
log1/8(1-3x)=-2
log1/8(1-3x)=log1/8 64
1-3x=64
-3x=63
x=-21