1708
1.Find: Π(n3-1)/(n3+1),from n=2 to n=∞.
2 If the equation x4 -4x3+ax2+bx+1=0 has 4 +ve roots then...
value of (\a/+\b/)/(a+b)=? \ /=mod..
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13 Answers
36Thankyou sir but, alpha + beta + gama + delta = 4
and please show how u've used this inequality
A.M >= G.M
1708$I am Getting $\prod_{n=2}^{\infty}\frac{n^3-1}{n^3+1}=\frac{2}{7}.
1A small hint for the second problem:
\left(n+1 \right)^2-\left(n+1 \right)+1=n^2+n+1
I am not getting \frac{2}{7} btw...
21i have got 2/3...by splitting n^3-1 and n^3+1 ,follow the pattern how diagonally terms are getting canceled...by taking limit to infinity we get the solution....may b answer is wrong...but approach is ok..