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Q4 on 2017 Edexcel C4 paper, concerns differentiation of multiple variables.

(a) Asks to differentiate an equation C: 4x² - y³ - 4xy + 2^y = 0Then use the fact that point P (-2,4), lies on C to find an expression for dy/dx Differential of form 8x - ...

Answered by Alexander W. • Maths tutor

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In Scene IV of the Poker Night in Tennessee Williams' A Streetcar Named Desire, what is the significance of the use of primary colours in the setting of the Kowlaski Apartment?

In the Scene of the Poker Night in A Streetcar Named Desire, the opening description of the living room as being romanticised by ‘primary colours’ is in stark contrast to the description of New Orleans in...

Answered by Esther A. • English Literature tutor

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What would be the effect on the UK Economy of an increase in the Bank of England Base Rate?

AD=C+I+G+X-M1) Increased cost of borrowing-ConsumptionVariable rate mortgages will now have higher monthly interestrepayments. This leads to a decrease in disposable income for consumers.Consumers ...

Answered by Alex N. • Economics tutor

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The complex numbers Z and W are given by Z=3+3i and W=6-i. Giving your answers in the form of x+yi and showing how you clearly obtain them, find: i) 3Z-4W ii) Z*/W

i) 3Z-4WFor this question it is just the matter of substituting the complex numbers of Z and W into the equation. So, 3(4+3i)-4(6-i). Then multiply out the brackets to get 12+9i-24+4i. Finally simply to g...

Answered by James B. • Maths tutor

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