若(2+根号3)^^m=1,求m²-1/m+1-m²-m/根号m²-2m+1的值
问题描述:
若(2+根号3)^^m=1,求m²-1/m+1-m²-m/根号m²-2m+1的值
答
∵(2+根号3)^^m=1
∴m=0
m²-1/m+1-m²-m/根号m²-2m+1
=(m-1)(m+1)/(m+1)-m(m-1)/(m-1)²
=m-1-[m/(m-1)]
=0-1-0/(0-1)
=-1