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You find the mean of a set of data by adding up all of the values then dividing the number you get by the total numbers in the data. An example of this is: 'Find the mean of '6, 8, 9, 17' <...
As the coefficient (the number before) of x2 is 1 we can start the expression with (x...The coefficient of x is -8 so we half this to complete the brackets and form (x-4)2...Next the...
f(x) = (x - 5) / (x + 4)(x + 1) let f(x) = A / (x + 4) + B / (x + 1) so (x - 5) / (x + 4)(x + 1) = A / (x + 4) + B / (x + 1) then multiplying by (x+4)(x+1), we get ...
tt the brafckTo expand any brackets, simple or double the golden rule to remember is you must multiply everything inside the bracket by everything outside the bracket. Let's run through some examples:2(x+...
f(x)=x^3 +24x+3 f'(x)=3x2+24 Since x^2>0 for all real x 3x^2+24>0 So f(x) is an increasing function
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