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Why did the Russian government abolish serfdom in 1861?

On the 19 th of February 1861 Tsar Alexander II signed into law the statues abolishing serfdom in the Russian Empire. This directly affected 22,557,748 peasant men, women and children, and around 100,000 nob...
Answered by • History tutor
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How do I construct a 'si' clause?

'Si' means 'if' in French. Like in English, it is used to talk about things that could happen . This is a 'si' clause in English: 'If I was rich, I would buy loads of books.' To say this in French, we would ...
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Answered by Elliot K. • French tutor
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Solve: 3x+5y=19 4x-2y=-18

These are simultaneous equations and we need to find the value of X and Y. We can use the elimination method. The coefficients (the amount the letter is being multiplied by) of X and Y do not match. First, w...
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Answered by Charlotte L. • Maths tutor
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How do I maximise/minimise a given function f(x)?

To find an extreme point of a function you must first take the derivative of f(x) with respect to x. As the function will peak/trough at the extreme point, the gradient at this point will be equal to 0 and t...
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The curve C has the equation y=3x/(9+x^2 ) (a) Find the turning points of the curve C (b) Using the fact that (d^2 y)/(dx^2 )=(6x(x^2-27))/(x^2+9)^3 or otherwise, classify the nature of each turning point of C

(a)To find the turning points of a curve, need to solve dy/dx=0. Using the quotient rule one can differentiate y:y=f(x)/g(x) dy/dx=(f'(x)g(x)-f(x)g'(x))/(g(x)) 2 f(x)=3x, f'(x)=3, g(x)=(9+x 2 ), g'(x)=2x→ dy...
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Answered by Liora C. • Maths tutor
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