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The cubic equation 27(z^3) + k(z^2) + 4 = 0 has roots α, β and γ. In the case where β=γ, find the roots of the equation and determine the value of k

This question was worth 8 marks in a 2015 FP2 paper. The first part of this question is tricky, but once we have found the roots it will be easy to plug them in to get the value of k: When we have an equatio...
RG
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How do I structure a commentary?

This varies from person to person. Some teachers recommend structuring your paragraphs according to literary devices, for example focusing on tone in one paragraph, structure on another, and figurative langu...
AG
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How can I do well in a writing exam where there's so much room for mistakes?

Writing language exams can be difficult - you need to have grammar, language and message in mind as you write, but I found that practice was the trick. Aim to write as many practice exams as you can (I recom...
AG
Answered by Ana G. • Spanish tutor
2958 Views

How can I learn all the difficult memory facts if I am not good at memorisation?

Don't panic! This is a thought that goes through every student who does IB or A Level Biology, and the answer is that there are an endless number of techniques and tricks that can help every different type o...
AG
Answered by Ana G. • Biology tutor
3069 Views

The set of midpoints of the parallel chords of an ellipse with gradient, constant 'm', lie on a straight line: find its equation; equation of ellipse: x^2 + 4y^2 = 4

// Allow me to make the question more explicit: we have a set of lines of equal gradients ‘m’. We need to find a line through which the midpoints of the intersections of these lines with the ellipse; an elli...
DP
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