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Are there strict objectives to follow in an English essay?

Most of the time, English encourages students to be expressive and nuanced in the way they write. For A-Level, more so than GCSE, there are certain requirements put forth by different exam boards. Edexcel, f...
TS
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If y = sec(z)tan(z)/sqrt(sec(z)) then find the indefinite integral of y with respect to z.

Using the substitution u = sec(z)=> du = sec(z)tan(z) dz.So, the integral ∫ y dz = ∫ sec(z)tan(z)/sqrt(sec(z)) dz=> ∫ y dz = ∫ 1/sqrt(u) du = 2sqrt(u) + C = 2sqrt(sec(z)) + C.
JM
Answered by Jordan M. • Maths tutor
7426 Views

Find the stationary points on y = x^3 + 3x^2 + 4 and identify whether these are maximum or minimum points.

First, you will need to differentiate the function with respect to x. Finding dy/dx.For polynomials, this is done by taking one away from the old power and multiplying the coefficient by the old power and re...
LH
Answered by Laurence H. • Maths tutor
9425 Views

What are the possible ways to find the roots from a quadratic equation?

quadratic equation where the coefficients of the quadratic equation: ax^2 + bx + c are substituted into the formula: [-b +- (b^2 - 4ac)^0.5] / 2a. The roots are what x equalscompleting the square where the c...
SB
Answered by Sophie B. • Maths tutor
3776 Views

Factorise and Solve x^2 + 10x + 15 = -6

To factorise an equation like this we must first make the equation equal to 0 therefore it becomes: x^2+10x+21.Now we have the equation in a way that we can work with it we can factorise.To do this we need t...
JV
Answered by Joseph V. • Maths tutor
3690 Views