[微積] 級數收斂發散
題目是
sum[1*3*5*....*(2n-1)/2*4*6*.....*2n]^2
還有一題是
(a) Gauss's test is often given in the form of a test of the ratio
Un/Un+1 =(n^2+a1n+a0)/(n^2+b1n+b0)
For what values of the parameters a1 and b1 is there convergence? Divergence?
(b) Use the result in park (a) to determine the convergent range for:
F(c,d,e,x)=1+cdx/1!e +c(c+1)d(d+1)x^2/2!e(e+1) +.....
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