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Maths
A Level

a) Find the indefinite integral of sec^2(3x) with respect to x. b) Using integration by parts, or otherwise, find the indefinite integral of x*sec^2(3x) with respect to x.

a) First deduce that problem can be solved by inspection. Then use the fact that the derivative of tan3x equals 3sec^2(3x) and adjust for the constant. (Note this fact should be given in a formula booklet...

Answered by Ebrahim R. Maths tutor
2823 Views

How do you integrate the natural logarithm?

We already know that the derivative of ln(x) is 1/x, so how can this be used for integration?Recall integration by parts uses knowledge of the derivative of one of the parts in the formula.int(u v' dx) = ...

Answered by Josh L. Maths tutor
2141 Views

solve x^3+2x^2+x=0

factorise x3+2x2+x=0 => x(x2+2x+1)=0 => x(x+1)(x+1)=0 => x(x+1)2=0 => This leads to x=0 and (x+1)2=0 so x=0 and x+1=0 => Giving us the...

Answered by Robbie R. Maths tutor
4223 Views

Using the sum, chain and product rules, differentiate the function f(x) = x^n +x^3 * sin(1/[3x])

The following function consists of the sum of two variables x^n and x^3 * sin(1/[3x]). Let's break the differentiation down term by term and differentiate xn first since it's the easier term. R...

Answered by Valeri S. Maths tutor
2484 Views

Calculate the indefinite integral of ln(x)?

This would be calculated using the integration by parts method: NOTE: You can consider the function ln(x) to be a constant of value 1 multiplied by ln(x)....

Answered by Uwais O. Maths tutor
3084 Views

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