# donvoldy666

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bio website location age member for 1 year, 10 months seen Jun 5 '13 at 16:42 profile views 18

# 9 Questions

 22 How to show that a root of the equation $x (x+1)(x+2) … (x+2009) = c$ can have multiplicity at most 2? 10 Finding real roots of $P(x)=x^8 - x^7 +x^2 -x +15$ 8 Proving that a natural number made entirely of 6's and 0's is not a square. 6 Summing $\sum _{k=1}^{n} k\cos(k\theta)$ and $\sum _{k=1}^{n} k\sin(k\theta)$ 2 Finding $\sum_{n=1}^\infty {{1} \over ({2n-1})^2}$ given $\sum_{n=1} ^ \infty {{1} \over {n^2}} = {{\pi^2}\over {6}}$

# 374 Reputation

 +30 Finding real roots of $P(x)=x^8 - x^7 +x^2 -x +15$ +10 How to show that a root of the equation $x (x+1)(x+2) … (x+2009) = c$ can have multiplicity at most 2? +5 Proving that a natural number made entirely of 6's and 0's is not a square. +5 Summing $\sum _{k=1}^{n} k\cos(k\theta)$ and $\sum _{k=1}^{n} k\sin(k\theta)$

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# 10 Tags

 0 polynomials × 4 0 functions × 2 0 roots × 2 0 logarithms 0 summation × 2 0 numerical-methods 0 trigonometry × 2 0 elementary-number-theory 0 complex-numbers × 2 0 sequences-and-series

# 2 Accounts

 Mathematics 374 rep 19 Ask Ubuntu 101 rep 1