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a)starting from ax2+bx+c=0, divide through by a, x2+(b/a)x+c/a=0, complete the square (x+(b/2a))2-(b/2a)2 +c/a=0, expand (x+(b/2a))2-(b2/4...
dy/dx=6cos2x-8sin2xExplanation: cos x difrentiates to -sinx, we must times the coefficient of cos2x,(4) , by the differential of 2x (ie 2), giving -(4x2)sin2x.Similarly, sinx differentiates cosx, so using...
In order to find the stationary points we need to find the first derivative, set it to 0 and solve for x. We can then use this value to find the value for y.y = e(3x-x^3)We know for the derivat...
To solve a question we want to get the x terms and one sides, the variables, and the numbers on the other side, the constants.7x + 6 > 1 + 2xSubtract 2x from 7x so we only have x terms on the left hand...
The question is asking us to give our answer in centimetres, so the first step to solve this problem will be to convert all the lengths into centimetres. 1cm = 10mm so 160mm = 160/10 = Answered by Fizza A. • Maths tutor2759 Views
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