方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.
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![方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.](/uploads/image/z/6855126-6-6.jpg?t=%E6%96%B9%E7%A8%8Blog2%28x%29%3D%28x-1%29%26%23178%3B-1%E7%9A%84%E8%A7%A3%E7%9A%84%E4%B8%AA%E6%95%B0%E4%B8%BA%28+%29a%2C0+b%2C1+c%2C2+d%2C3.%E6%96%B9%E7%A8%8Blog2%28x%29%3D%28x-1%29%26%23178%3B-1%E7%9A%84%E8%A7%A3%E7%9A%84%E4%B8%AA%E6%95%B0%E4%B8%BA%28+%29a%2C0+b%2C1+c%2C2+d%2C3.)
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方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.
方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.
方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.
方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.方程log2(x)=(x-1)²-1的解的个数为( )a,0 b,1 c,2 d,3.
答:C
log2(x)=(x-1)²-1
y=log2(x)是单调递增函数
y=(x-1)²-1是抛物线,
对称轴x=1,开口向上,顶点(1,-1)
两条曲线存在2个不同的交点
选择C