1÷(1×2)+1÷(2x3)……+1÷(n(n-1))=1一1÷(n+1),求x÷(1x2)十

化简:[1-1÷(2×2)]×[1-1÷(3×3)]×[1-1÷(4×4)]×[1-1÷(5×5)].×[1-1÷(n×n)],并求出当n=2006时的值.
原式=3/4×(2/3×4/3)×(3/4×5/4)×(4/5×6/5)×… ×[(n-1)/n×(n+1)/n]=3/4×2/3×(n+1)/n=(n+1)/2n当N=2006时,原式=
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扫描下载二维码1÷2+2÷3+3÷4+┅┅+(n-1÷n)请尽快解答,请在回答时附带符号解释(如^的意思)可解答此题,也可解答1÷2+1÷3+1÷4.....1÷n=?
n-Psi(n+1)-eulergammaEulerGamma=0.53.高斯常数psi就复杂了.你要去查查这个函数,一般给你说不清,下边是英文的解释.psi(1)=-EulerGammaY = psi(X) evaluates the function for each element of array X.X must be real and nonnegative.The function,also known as the digamma function,is the logarithmic derivative of the gamma function Y = psi(k,X) evaluates the kth derivative of at the elements of X.psi(0,X) is the digamma function,psi(1,X) is the trigamma function,psi(2,X) is the tetragamma function,etc.Y = psi(k0:k1,X) evaluates derivatives of order k0 through k1 at X.Y(k,j) is the (k-1+k0)th derivative of ,evaluated at X(j).
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k*(k+1)=k^2+k 原式等于 1+2+3+...+n+1^2+2^2+3^2+...+n^2 结果: n(n+1)(n+2)/3
EulerGamma=0.53....高斯常数
k*(k+1)=k^2+k 原式等于 1+2+3+...+n+1^2+2^2+3^2+...+n^2 结果: n(n+1)(n+2)/3
n-Psi(n+1)-eulergamma EulerGamma=0.53....高斯常数 psi就复杂了。你要去查查这个函数,一般给你说不清,下边是英文的解释。psi(1)=-EulerGamma Y = psi(X) evaluates the function for each element of array X. X must be ...
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