360(n+2)+(360/n) =1350 解方程怎么解
问题描述:
360(n+2)+(360/n) =1350 解方程怎么解
答
360(n+2)+(360/n)=1350360*n+720+(360/n)=1350360*n+(360/n)=1350-720=630360(n+1/n)=630n+1/n=630/360=7/4n^2-(7/4)n+1=0n1=7/8+((7/8)^2-1)^0.5=7/8+(49/64-1)^0.5=7/8+(-15)^0.5/8n2=7/8-((7/8)^2-1)^0.5=7/8-(49...