Top answers

What's the best way to answer a question with a source?

Highlight links and annotate precisely so you don't forget how it specifically links to your point.In answer write the link in quote marks and in sentence use phrases like 'as the item says...' to sign post ...
MH
Answered by Molly H. • Sociology tutor
2238 Views

Using de Moivre's theorem demonstrate that "sin6x+sin2x(16(sinx)^4-16(sinx)^2+3)"

Consider, (cosX+isinX) 6 using binomial expansion we find that this = "cos 6 X + 6icos 5 XsinX - 15cos 4 Xsin 2 X - 20icos 3 Xsin 3 X + 15cos 2 Xsin 4 X + 6icosXsin 5 X - sin 6 X". Next, by using d...
5400 Views

Find h(x), for x≠0, x≠1, given that: h(x)+h(1/(1−x))=1−x−1/(1−x)

In order to do this question, we need to find some way of eliminating the h(1/(1−x)), so that we are left with h(x), thus solving it. One way to do this, is to set up simultaneous equations. We may need to s...
JO
Answered by Joss O. • STEP tutor
2381 Views

Prove that 27(23^n)+17(10^2n)+22n is divisible by 11 for n belongs to the natural numbers

Proofs come in many shapes and sizes but this one is done via induction. When doing proof by induction, examiners love a list of a clear definite list of steps, the first being the base case, in this case it...
3344 Views

Describe the differences and similarities between osmosis and diffusion (4 marks)

Similarities:neither require energyboth move particles from a high concentration to a low concentration area differences:Osmosis requires a partially permeable memberonly water moves by osmosis but liquids a...
BW
Answered by Brian W. • Biology tutor
3498 Views