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Mathematics
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H.Linkhorn

I'm an A-level student in maths, further maths, chemistry and physics; i also help out at my local school helping in general revision and giving demonstrations to children to help gain their interest in science.

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  • Portsmouth, UK
  • Member for 1 year
  • 107 profile views
  • Last seen Feb 14 at 18:58

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Top Posts (56) All Questions Answers | Votes Newest

6 Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with steps of $0.5$ Feb 10
5 Evaluate $\sum_{r=2}^{\infty} \frac{2-r}{r(r+1)(r+2)}$ Dec 31 '18
5 Integral of $\int\frac{\sin x}{\sin x+\cos x}dx$ Dec 12 '18
4 Sum of two infinite complex geometric sums Nov 15 '18
3 summation of $\sum_{n=1}^\infty \frac {2^n+4^n}{6^n}$ Sep 28 '18
3 If $z=\cos\theta + i\sin \theta$ prove $\frac{z^2-1}{z^2+1}=i\tan\theta$ Jan 14
2 A curve is defined by the parametric equations $x=2t+\frac{1}{t^2},\; y=2t-\frac{1}{t^2}$. Find the Cartesian equation. Jan 20
2 By creating a reduction formula for $I_n=\int_0 ^\pi x^n \sin x \,dx$ Show that $I_4=\pi^4 -12\pi^2 + 48$ Feb 1
2 If $f(x)$ is a polynomial and $f(n)$ is an integer for all $n\in \mathbb{Z}$, then $f(x)$ must have integer coefficients. Sep 5 '18
2 Find the sum of $\sum_{r=1}^n\frac{1}{r(r+1)(r+2)}$ [duplicate] Oct 3 '18
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