因为:1=23-22所以:(22k+1)/(k-1)=[22(k-1)+23]/(k-1) =22+23/(k-1)
{[(22K+1)+K-24]-K+24}/K-1 = [(23K-23)+24-K]/K-1 ==23/(K-1)+24-K
23/(K-1)+24-K即可