e^x=1+x+x^2/2!+x^3/3!+...+x^n/n!x=9 求和 的vb答案是多少 n=25

e^x+(x-3)e^x =[1+(x-3)]e^x =(x-2)e^x 关于极限1.lim((x^-1) + (x^-4))/((x^-2) - (x^-3)) x-> 正无穷2.lim ((e^x) - (e^-x))/((e^x) + (e^-x)) x-> 负无穷 y=(x乘以根号x+3)e^2x ,y=x^x^2+e^x^2+x^e^x+e^e^x ,的导数是多少 y=3^x*e^x-2^x+e求导 ln[(e^x+e^2x+e^3x)/3]'=[ln(e^x+e^2x+e^3x)+ln3]'=(e^x+2e^2x+3e^3x)/(e^x+e^2x+e^3x)对不对?ln[(e^x+e^2x+e^3x)/3]'=3*(e^x+2e^2x+3e^3x)/(e^x+e^2x+e^3x)对不对?哪个对? 求不定积分：∫(e^3x+e^x)dx/(e^4x-e^2x +1) 求不定积分f[(e^3x+e^x)/(e^4x-e^2x+1)]dx lim x趋于0 (x(e^x+1)-2(e^x-1))/x^3 ∫ e^x-e^(-x)dx=e^x+e^(-x)|=e+1/e-2 y=[x(x+1)/(x+2)e^x]^1/3怎么求其微分.y={x(x+1)/[(x+2)e^x]}^1/3 c语言输入一个实数x,计算x^2+1 x>=-1x+cos(x) -1>x>=-3x^3+e^x x 设f(x)=x㏑(1+x^2),x≥0.(x^2+2x-3)e^(-x),x＜0,求∫f(x)dx 求极限lim(x~0)((e^x+e^2x+e^3x)/3)^1/xs 已知函数f(x)=(x^3-2(x^2))/e^x已知函数f(x)=(x^3-2x^2)/e^x.(1)求函数f(x)的极值;(2)当x>0时af(x)+xf'(x) *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 设f(x)=(e^x-e^-x)/2,g(x)=(e^x+e^-x)/2,求证:)设f(x)=[(e^x)-(e^-x)]/2,g(x)=[(e^x)+(e^-x)]/2,求证:(1)[g(x)]^2-[f(x)]^2=1(2)f(2x)=2f(x)·g(x),(注意“·”为乘号)(3)g(2x)=[g(x)]^2+[f(x)]^2 f(x)=x(e^x-1)-1/2 x 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x