H.Linkhorn

Portsmouth, UK

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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Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with steps of $0.5$

summation notation asked Feb 10 '19 at 19:26

math.stackexchange.com

8 votes

Calculating the strength of an ionic bond that contains poly-atomic ions

physical-chemistry thermodynamics enthalpy ionic-compounds solid-state-chemistry asked Feb 24 '19 at 13:03

chemistry.stackexchange.com

6 votes

Prove by induction that $\sum _{r=1}^n \cos((2r-1)\theta) = \frac{\sin(2n\theta)}{2\sin\theta}$ is true $\forall \ n \in \mathbb{Z^+}$

summation induction trigonometric-series asked Jun 5 '19 at 20:24

math.stackexchange.com

6 votes

Integral of $\int\frac{\sin x}{\sin x+\cos x}dx$

integration trigonometric-integrals asked Dec 12 '18 at 17:35

math.stackexchange.com

5 votes

Evaluate $\sum_{r=2}^{\infty} \frac{2-r}{r(r+1)(r+2)}$

summation asked Dec 31 '18 at 15:47

math.stackexchange.com

5 votes

Sum of two infinite complex geometric sums

sequences-and-series complex-numbers asked Nov 15 '18 at 11:14

math.stackexchange.com

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H.Linkhorn

Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with steps of $0.5$

Calculating the strength of an ionic bond that contains poly-atomic ions

Prove by induction that $\sum _{r=1}^n \cos((2r-1)\theta) = \frac{\sin(2n\theta)}{2\sin\theta}$ is true $\forall \ n \in \mathbb{Z^+}$

Integral of $\int\frac{\sin x}{\sin x+\cos x}dx$

Evaluate $\sum_{r=2}^{\infty} \frac{2-r}{r(r+1)(r+2)}$

Sum of two infinite complex geometric sums