(log2 x)=(log2 x)^2-log2 x+2 (1) =(log2 x-0.5)^2+7/4 (2) 第一步
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(log2 x)=(log2 x)^2-log2 x+2 (1) =(log2 x-0.5)^2+7/4 (2) 第一步式子 如何转化成第二步的
![(log2 x)=(log2 x)^2-log2 x+2 (1) =(log2 x-0.5)^2+7/4 (2) 第一步](/uploads/image/z/15373000-64-0.jpg?t=%28log2+x%29%3D%28log2+x%29%5E2-log2+x%2B2+%281%29+%3D%28log2+x-0.5%29%5E2%2B7%2F4+%282%29+%E7%AC%AC%E4%B8%80%E6%AD%A5)
为表达方便起见,设log2 x=A,
A²-A+2
=A²-2×A×(1/2)+(1/2)²+2-(1/2)²
=(A-1/2)²+7/4 (配方法)
A²-A+2
=A²-2×A×(1/2)+(1/2)²+2-(1/2)²
=(A-1/2)²+7/4 (配方法)
解方程log2(2-x)=log2(x-1)+1
log2 (x + 3) + log2(x + 2) = 1
|2x-log2^x|
求导 y=log2(x^2)-log2(x)
解方程log2(x+14)-log2(x+6)=3-log2(x+2)
已知函数f(x)=log2(2-x)+log2(2+x),g(x)=log2(2x-1)
高一数学log2(4^x+4)=x+log2(2^(x+1)-3)
log2(4^x+4)=x+log2(2^x+1-3)
解方程log2^(4^x+4)=x+log2^[2^(x+1)-3]
求函数f(x)=(log2 4x)(log2 2x)在1/4
解方程:log2(4^x+4)=x+log2(2^(x+1)-3)
解方程log2(4^x+1)=x+log2(2^(x+3)-6)