x²+2x+1/x^4-3x+1
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咨询记录 · 回答于2023-12-30
x²+2x+1/x^4-3x+1
您好,
1. 原式=lim(x->∞)[(x^2-1)/(2x^2-x+1)]
=lim(x->∞)[(1-1/x^2)/(2-1/x+1/x^2)]
=(1-0)/(2-0+0)
=1/2;
2. 原式=lim(x->∞)[(x^2+x)/(x^4-3x+1)]
=lim(x->∞)[(1/x^2+1/x^3)/(1-3/x^3+1/x^4)]
=(0+0)/(1-0+0)
=0.