Top answers

find dy/dx when y=x^3 + sin2x

so this question is asking you to differentiate x 3 + sin2xwe know that x n differentiates do nx n-1 , so using that x 3 will differentiate to 3x 2 we know that sinx differentiates to cosx and 2x differentia...
Answered by • Maths tutor
5088 Views

Ignoring air resistance and assuming gravity to equal 9.81. If a ball of mass 1kg is dropped from a height of 100m, calculate it's final velocity before it hits the ground.

G = 9.81u = 0s = 100v 2 = u 2 + 2asv 2 = 2 * 100 * 9.81v = root( 2 * 100 * 9.81) = 44.29ms -1 This question can be made into a 3 part question suitable for advanced A level students B) Determine or show grap...
Answered by • Maths tutor
4422 Views

Integrate with respect to x [x^2]

Integrate(x 2 )When we integrate we use the formula x n+1 /n+1So therefore as in this case n=2So taking this all into account, the integral of x 2 = x 3 /3
Answered by • Maths tutor
4053 Views

A rectangle has an area of 20 cm2. Its length and width are enlarged by scale factor 3. Find the area of the enlarged rectangle.

Area of rectangle is 20 cm 2 . The new area of the enlarged rectangle is the original area, 20 cm 2 , times the area scale factor. We are only given the length scale factor, therefore, we need to work out th...
PB
Answered by Paulina B. • Maths tutor
5043 Views

Find the turning points on the curve with the equation y=x^4-12x^2

y = x^4 - 12x^2 dy/dx = 4x^3 - 24x The turning points are where dy/dx = 0 4x^3 - 24x =0 x(4x^2 - 24) = 0 Therefore one of the turning points is at x = 0 4x^2 - 24 = 0 4x^2 = 24 x^2 = 6 x = +/- √6 Substitute ...
Answered by • Maths tutor
5067 Views