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(n+1)!/k!-/(k-1)!=(n+1)!/k!-k*n!/k*(k-1)!=(n+1)!/k!-kn!/k!=[(n+1)!-kn!]/k!=(n-k+1)n!/k(n+1)!/k!-/(k-

(n+1)^k-n^k的极限k(n+1)^k-n^k的极限k(n+1)^k-n^k的极限klim(n->∞)(n+1)^k-n^k=lim(n->∞)n^k[(1+1/n)^k-1]∵lim(n->∞

谁能告诉我泊松定理怎么证明?n(n-1)...(n-k+1)/k!(λ/n)^k怎么就等于(λ^k/k!)(1-1/n)(1-2/n)...(1-(k-1)/n)?谁能告诉我泊松定理怎么证明?n(n-

请问1^k+2^k+3^k+.+n^k=?请问1^k+2^k+3^k+.+n^k=?请问1^k+2^k+3^k+.+n^k=?不知道你学过二项式定理吗?知道组合数C(n,m)吗?假设你已经学过的话,看

证明：（n+1）!/k!-n!/（k-1）!=（n-k+1）*n!/k!（k≤n）证明：（n+1）!/k!-n!/（k-1）!=（n-k+1）*n!/k!（k≤n）证明：（n+1）!/k!-n!/（k

求limn→+∞(1/n^k+2/n^k++n/n^k)有三种情况,求limn→+∞(1/n^k+2/n^k++n/n^k)有三种情况,求limn→+∞(1/n^k+2/n^k++n/n^k)有三种情

试证明x/[n(n+k)]=(x/k)[1/n-1/(n+k)]试证明x/[n(n+k)]=(x/k)[1/n-1/(n+k)]试证明x/[n(n+k)]=(x/k)[1/n-1/(n+k)]证明：右

证明C(n+1,k)=C(n,k-1)+C(n,k)及C(n,r)*C(r,k)=C(n,k)*C(n-k,r-k)证明C(n+1,k)=C(n,k-1)+C(n,k)证明C(n,r)*C(r,k)=

求证:对任何自然数n,1*2*3...*k+2*3*4...(k+1)+...n(n+1)...(n+k-1)=[n(n+1)...(n+k)]/(k+1)求证:对任何自然数n,1*2*3...*k+

求证：lim1^k+2^k+3^k+4^k+.n^k/n^(k+1)=1/k+1n是正整数，后面的k+1有括号的求证：lim1^k+2^k+3^k+4^k+.n^k/n^(k+1)=1/k+1n是正整

sum（k,n）=1^k+2^k+...+n^k的vb编码sum（k,n）=1^k+2^k+...+n^k的vb编码sum（k,n）=1^k+2^k+...+n^k的vb编码Functionsum(k

sum（k,n）=1^k+2^k+...+n^k的vb编码sum（k,n）=1^k+2^k+...+n^k的vb编码sum（k,n）=1^k+2^k+...+n^k的vb编码Functionsum(k

证明n*(x+1)^(n-1)=Σ(k=0到n)k*c(n,k)*x^(k-1)证明n*(x+1)^(n-1)=Σ(k=0到n)k*c(n,k)*x^(k-1)证明n*(x+1)^(n-1)=Σ(k=

(n->00)Lim(n+k)/(n^2+k)(n从1—直加到n)(n->00)Lim(n+k)/(n^2+k)(n从1—直加到n)(n->00)Lim(n+k)/(n^2+k)(n从1—直加到n)利

求极限k^2/(n^3+k^3)n趋于无穷,k=1到n求极限k^2/(n^3+k^3)n趋于无穷,k=1到n求极限k^2/(n^3+k^3)n趋于无穷,k=1到n极限与积分的转换具体做法如下：不懂再问

证明组合C(n-1,k)+C(n-2,k)+…+C(k+1,k)+C(k,k)=C(n,k+1)证明组合C(n-1,k)+C(n-2,k)+…+C(k+1,k)+C(k,k)=C(n,k+1)证明组合

求数分大神lim(n→∞)∑(k=1→n)√((n+k)(n+k+1)/n^4)求数分大神lim(n→∞)∑(k=1→n)√((n+k)(n+k+1)/n^4)求数分大神lim(n→∞)∑(k=1→n

排列组合计算：(1/k!)X[1/(n-k)!]=?（1/k!)X[1/(n-k)!]=1/[k!X(n-k)!]=1/(n!Xk)X(n-k)!=n!Xk!-k!Xk!排列组合计算：(1/k!)X[

设向量m=(1-k,1-k,k),n=(2,k,k),则|m-n|的最小值设向量m=(1-k,1-k,k),n=(2,k,k),则|m-n|的最小值设向量m=(1-k,1-k,k),n=(2,k,k)

计算lim(n→∞)∑上n下k=1(k+2)/[k!+(K+1)!+(K+2)!]计算lim(n→∞)∑上n下k=1(k+2)/[k!+(K+1)!+(K+2)!]计算lim(n→∞)∑上n下k=1(