数学题在线解答x
问题描述：
数学题在线解答x次方+1）的值
答
x-1/x=根号5(x-1/x)^2=5,x^2+1/x^2-2=5,x^2+1/x^2=7(x^2+1/x^2)^2=49,x^4+1/x^4+2=49,x^4+1/x^4=47(x^10+x^6+x^4+1)/(x^10+x^8+x^2+1)=[x^2(x^8+x^4+x^2+1/x^2)]/[x^4(x^6+x^4+1/x^2+1/x^4)]=[(x^8+x^4)+(x^2+1/x^2)...