log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+lo
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log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解,求每步详...
log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解,
log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解,
log(2x)+log(3y)-log(2z)=log(3xy/z)
log3(x^2-2x-6)=2
log3(x^2-2x-6)=log3(9)
x^2-2x-6=9
x=-3 或 x=5
log(3x+6)=1+log(x)=log(10x)
3x+6=10x
x=6/7
log3(x^2-2x-6)=2
log3(x^2-2x-6)=log3(9)
x^2-2x-6=9
x=-3 或 x=5
log(3x+6)=1+log(x)=log(10x)
3x+6=10x
x=6/7
log(2x)+log(3y)-log(2z) 怎么化简? log3(x^2-2x-6)=2 log(3x+6)=1+l
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