極限n^2*((n^2+3)/(n^2-3))^0.5-n^2

证明不等式：(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n证明不等式：(1/n)^n+(2/n)^n+(3/n)^n+.+(n/n)^n证明不等式：(1/n)^n+(2/n)^n+

[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简原

[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简[3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简分

化简n分之n-1+n分之n-2+n分之n-3+.+n分之1化简n分之n-1+n分之n-2+n分之n-3+.+n分之1化简n分之n-1+n分之n-2+n分之n-3+.+n分之1(n-1)/n=1-1/n

化简n分之n-1+n分之n-2+n分之n-3+.+n分之1化简n分之n-1+n分之n-2+n分之n-3+.+n分之1化简n分之n-1+n分之n-2+n分之n-3+.+n分之1(1+2+3+.+n-1)

-2n+n^2+n^3还能化简吗?-2n+n^2+n^3还能化简吗?-2n+n^2+n^3还能化简吗?-2n+n^2+n^3还能化简吗?不能.还可以提公因式：=n（n^2+n-2）=n（n+2）（n-

-n^3+8n^2-16n-n^3+8n^2-16n-n^3+8n^2-16n-n(n-4)^2

化简(n+1)(n+2)(n+3)化简(n+1)(n+2)(n+3)化简(n+1)(n+2)(n+3)设n+2=x所以(n+1)(n+2)(n+3)=(x-1)*x*(x+1)=(x^2-1)*x=x

当n为正偶数,求证n/(n-1)+n(n-2)/(n-1)(n-3)+...+n(n-2).2/(n-1)(n-3)...1=n当n为正偶数,求证n/(n-1)+n(n-2)/(n-1)(n-3)+.

2^n/n*(n+1)2^n/n*(n+1)2^n/n*(n+1)1/2*f(1/2)=(1/2)^2+3*(1/2)^3...+(2n-1)*(1/2)^(n+1)f(1/2)-1/2*f(1/2)

3(n-1)(n+3)-2(n-5)(n-2)3(n-1)(n+3)-2(n-5)(n-2)3(n-1)(n+3)-2(n-5)(n-2)3(n-1)(n+3)-2(n-5)(n-2)=3(n^2+2

2^n*3^n*5^n+2/30^n2^n*3^n*5^n+2/30^n2^n*3^n*5^n+2/30^n=2^n×3^n×5^n×5²/(2×3×5)^n=2^n×3^n×5^n×5&#

lim(n+3)(4-n)/(n-1)(3-2n)lim(n+3)(4-n)/(n-1)(3-2n)lim(n+3)(4-n)/(n-1)(3-2n)上下除以n²原式=lim(1+3/n)(

lim(n^3+n)/(n^4-3n^2+1)lim(n^3+n)/(n^4-3n^2+1)lim(n^3+n)/(n^4-3n^2+1)lim(n^3+n)/(n^4-3n^2+1)=lim(1/n

lim2^n+3^n/2^n+1+3^n+1lim2^n+3^n/2^n+1+3^n+1lim2^n+3^n/2^n+1+3^n+1n是趋向于无穷吗?如果是的话,就上下除以最大的数,上下除以3的n+1

n(n+1)(n+2)(n+3)+1因式分解n(n+1)(n+2)(n+3)+1因式分解n(n+1)(n+2)(n+3)+1因式分解n(n+1)(n+2)(n+3)+1=(n²+3n)(n&

lim[(n+3)/(n+1))]^(n-2)【n无穷大】lim[(n+3)/(n+1))]^(n-2)【n无穷大】lim[(n+3)/(n+1))]^(n-2)【n无穷大】lim[(n+3)/(n+

lim(2^n+3^n)^1\n(n趋向无穷)lim(2^n+3^n)^1\n(n趋向无穷)lim(2^n+3^n)^1\n(n趋向无穷)

n(n+1)(n+2)(n+3)+1等于多少n(n+1)(n+2)(n+3)+1等于多少n(n+1)(n+2)(n+3)+1等于多少(n^2+n)(n^2+5n+6)+1=n^4+6n^3+11n^2

级数n/(n+1)(n+2)(n+3)和是多少级数n/(n+1)(n+2)(n+3)和是多少级数n/(n+1)(n+2)(n+3)和是多少n/(n+1)(n+2)(n+3)=(n+1-1)/(n+1)