Question

求x趋向1时,lim(x^2-1/x^5-1)极限

Answer 1

原式=lim((X-1)(X+1)/((X-1)(X^4+X^3+X^2+x+1))
=lim(X+1)/(X^4+X^3+X^2+X+1)
=lim(1+1)/(1+1+1+1+1+1)
=2/5