M>0,N>0
M/N=(√A+1-√A)/(√A-√A-1)
=(√A+1-√A)*(√A+1+√A)(√A+√A-1)/(√A-√A-1)*(√A+√A-1)(√A+1+√A)
*旁边的乘在一起得1
M/N=(√A+√A-1)/(√A+1+√A) 下边大
所以M/N
M>0,N>0
M/N=(√A+1-√A)/(√A-√A-1)
=(√A+1-√A)*(√A+1+√A)(√A+√A-1)/(√A-√A-1)*(√A+√A-1)(√A+1+√A)
*旁边的乘在一起得1
M/N=(√A+√A-1)/(√A+1+√A) 下边大
所以M/N