Question

limx趋向于正无穷x四次方减一分之x四次方加一的极限过程

Answer 1

x^4-1分之x^4+1=(x^4-1+2)/(x^4-1)=1+2/(x^4-1)当x趋向于正无穷时(x^4-1)趋向于正无穷,于是2/(x^4-1)趋向于0,那么1+2/(x^4-1)向于1