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A curve has equation y = ax^2 + 3x, when x= -1, the gradient of the curve is -5. Work out the value of a.

The gradient of a curve at a point is given by dy/dxDifferentiate the equationplug in the valuesdy/dx = 2ax + 3x = -1, dy/dx = -5-5 = 2a*-1 + 38 = 2aa = 4
SE
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How should I approach an essay title that I find particularly challenging.

The first thing to remember with essay titles is that the question will most likely make a statement and ask you to what extent you agree or disagree with it. For example; "the ideals of freedom and opp...
RC
Answered by Rebecca C. • English tutor
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Sources: How do I analyse and understand a source?

The evaluation and critique of sources is part of the foundation of historical understanding, as a result, sources are extensively used throughout the GCSE and A Level programmes. At GCSE level, source paper...
CD
Answered by Cordelia D. • History tutor
4198 Views

How should I use the passive voice in Spanish?

The passive voice is a part of Spanish grammar that can be deceptive for English speakers. At the basic level, the passive voice in English and Spanish are very similar in grammatical structure: ser + el par...
EM
Answered by Eilidh M. • Spanish tutor
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How should I approach questions asking me to assess multiple turning points?

These questions are quite common/omnipresent on the OCR Thematic History Paper, normally for around 25 marks. There are two ways these questions are usually approached with many key similarities. a) the 'eve...
HM
Answered by Harry M. • History tutor
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