解方程 log2(x^2-3)=2log4(6x-10)-1等于2
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解方程log2(x^2-3)=2log4(6x-10)-1等于2解方程log2(x^2-3)=2log4(6x-10)-1等于2解方程log2(x^2-3)=2log4(6x-10)-1等于2log2
解方程 log2(x^2-3)=2log4(6x-10)-1等于2
解方程 log2(x^2-3)=2log4(6x-10)-1
等于2
解方程 log2(x^2-3)=2log4(6x-10)-1等于2
log2(x^2-3)=2log4(6x-10)-1
=》log2(x^2-3)=log4(6x-10)^2-1
=>log2(x^2-3)=log2(6x-10)-1
=》log2(x^2-3)=log2(6x-10)/2
=>x^2-3=(6x-10)/2
=>x^2-3x+2=0
=>x1=1(因为x^2-3x=2
log2(x^2-3)=2log4(6x-10)-1
log2(x^2-3)=log2(6x-10)-log2(2)=log2(3x-5)
x^2-3=3x-5>0,
x>5/3
x²-3x+2=0
(x-1)(x-2)=0
x1=1(不合舍去)
x2=2
log2(xˆ2-3)=2log4(6x-10)-1
log2(xˆ2-3)=2log2(6x-10)ˆ0.5-1
log2(xˆ2-3)=2*0.5log2(6x-10)-1
log2(xˆ2-3)=log2(6x-10)-1
log2(xˆ2-3)-log2(6x-10)=-1
log2[(xˆ2-3)/(6x-10)]=-1
(xˆ2-3)/(6x-10)=2ˆ-1
xˆ2-3=1/2*(6x-10)
接下来应该会做了吧
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