x+2^(x-1)=2.5,x+log2(x-1)=2.5,2^(x-1)=2.5-x即y=2^(x-1)与y=2.5-x的交点是x1,同理知x2,又因为y=2^(x-1)与y=log2(x-1)关于y=x-1对称,x1+x2为y=2.5-x,y=x-1交点横坐标2倍即3.5.
若x1满足2x+2^x=5,x2满足2x+2log2(x-1)=5,x1+x2=?
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