Question

limx→ 无穷2x-√x²-2x+5/3x+2

Answer 1

问：limx→ 无穷2x-√x²-2x+5/3x+2

答：答x趋向无穷，括号里的值为1，根号1等于1。

问：为什么等于1？

答：先化式子再待入

答：答[回答]lim(x→∞) (2x^3-2x+5)/(3x^2+x^2) =lim(x→∞) (2x^3-2x+5)/(4x^2) =lim(x→∞) (x/2 -1/2x +5/4x^2)

问：怎么化式子

答：lim(x→∞) (2x^-2x+5)/(3x^2+x^2) =lim(x→∞) (2x^3-2x+5)/(4x^2) =lim(x→∞) (x/2 -1/2x +

答：lim(x→∞) (2x^3-2x+5)/(3x^2+x^2) =lim(x→∞) (2x^3-2x+5)/(4x^2) =lim(x→∞) (x/2 -1/2x +5/4x^2) = ∞ 极限不存在

答：lim(x→∞) (2x^3-2x+5)/(3x^2+x^2) =lim(x→∞) (2x^3-2x+5)/(4x^2) =lim(x→∞) (x/2 -1/2x +5/4x^2) = ∞