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a) y = 9 -6x^2 - 12x^4
dy/dx = -12x - 48x^3
b) At stationary points dy/dx = 0.
-12x - 48x^3 = 0
48x^3 + 12x = 0
4x^3 + x = 0
x (4x^2 + 1) = 0
Either ...
The formula you are given is an equation which is written in terms of x. So we will be differentiating with respect to x.
When differentiating we take the current power and place that in front of ...
To find what x is, we must rearrange the equation so that it says x=. To do this we need to get rid of the -3 on the left hand side of the equation. This can be done by adding 3 to both sides of the equat...
Elimination:
Multiply equation (eqn) 1 by 2: 2y=2x-10
Subtract modified eqn 1 from 2: 8y=16
Divide through by 8JRAnswered by Jack R. • Maths tutor3602 Views
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