来自孙涛的问题
几道微积分1limxcot2xx-02lim2^nsin(x/2^n)n趋向于正无穷(x为不等于0的常数)3lim(tanx-sinx)/x^3x-0
几道微积分
1limxcot2x
x-0
2lim2^nsin(x/2^n)n趋向于正无穷(x为不等于0的常数)
3lim(tanx-sinx)/x^3
x-0
1回答
2020-05-02 08:48
几道微积分1limxcot2xx-02lim2^nsin(x/2^n)n趋向于正无穷(x为不等于0的常数)3lim(tanx-sinx)/x^3x-0
几道微积分
1limxcot2x
x-0
2lim2^nsin(x/2^n)n趋向于正无穷(x为不等于0的常数)
3lim(tanx-sinx)/x^3
x-0
1、lim(x->0)xcot2x=lim(x->0)x/tan2x=lim(x->0)(1/2)2x/tan2x=1/22、lim(x->∞)x(2^n/x)sin(x/2^n)=x3、lim(x->0)(tanx-sinx)/x^3=lim(x->0)[(secx)^2-cosx]/3x^2=lim(x->0)[2sinx/(cosx)^3+sinx]/...