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Maths
A Level

Differentiate 2x^3+23x^2+3x+5 and find the values of x for which the function f(x) is at either at a maximum or minimum point. (Don't need to specify which is which)

f(x)=2x3+23x2+3x+5

f'(x)=6x2+46x+3

Maximum or minimum when f'(x)=0

6x2+46x+3=0

Using the Quadratic Formula: x=(-b+-squareroot(b...

SK
Answered by Sanjana K. Maths tutor
3828 Views

Find f(x^(1/2)+4)dx (Where f is the integral sign)

The general form for an integrand if the integral is of the form f(x^n)dx is (1/(n+1)) * x^(n+1) +c This is applied to each term in the question, remembering the constant in the integrand:

So: f(6x...

MA
Answered by Michael A. Maths tutor
3020 Views

A curve has the equation y = 4x^3 . Differentiate with respect to y.

y = 4x3 To differentiate you must find dy/dx. To calculate dy/dx, look at this example using just letters from algebra: y = axb dy/dx = (ab)x(b-1) As you can see, to calcu...

SH
Answered by Samuel H. Maths tutor
4156 Views

An object of mass 2kg is placed on a smooth plane which is inclined at an angle of 30 degrees from the ground. Calculate the acceleration of the object.

Draw a free body force diagram of all the forces acting on the object.

Resolve the forces parallel and perpendicular to the plane.

Use the equation ΣF=ma to solve the accele...

DJ
Answered by Dillon J. Maths tutor
3143 Views

Integral of sin^2(x) with respect to x

It is impossible to dirctly integrate sin^2(x) so we must transform it into something that can be integrated. Trigonometry can be used to do this. Recall the identity cos(2x) = cos^2(x) - sin^2(x) and cos...

OF
Answered by Orlando F. Maths tutor
13031 Views

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