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Find the first and second derivatives of: y = 6 - 3x -4x^-3, and find the x coordinates of the line's turning points

dy/dx = -3 +12x^-4 d^2y/dx^2 = -48x^-5
MS
Answered by Matthew S. • Maths tutor
4035 Views

What is £23 increased by 4%?

There are two steps to solving this problem. First, we want to find out how much the increase itself is, so we want to calculate 4% of £23. Then, we want to add the result to the £23. That will give us the f...
GB
Answered by Giulia B. • Maths tutor
5731 Views

Solve for x and y, with x and y satisfying the equations x+4y=5 and 2x+2y=16.

x=9 y=-1
LS
Answered by Lucy S. • Maths tutor
4216 Views

Solve the simultaneous equations for x and y: 2x+4y=-12 and y=-x-2

From the question we have y = -x - 2 so we can sub in -x-2 everywhere there is a y in the first equation. The equation is then 2x+4(-x-2) = -12 expanding the brackets we get -2x-8=-12 which you can then rear...
DG
Answered by Daniel G. • Maths tutor
4467 Views

Integrate 2sin(theta)cos(2*theta)

cos(theta)-(4/3)cos 3 (theta)
CB
Answered by Chloe B. • Maths tutor
5859 Views