Top answers

Maths
All levels

How do I simplify a surd?

Take the number that is in the root sign, and change it to 2 numbers multiplied together (we want one of these numbers to be a square number). A square number is 1, 4, 9, 16 etc. Then separate this into t...

FE
Answered by Francesca E. Maths tutor
4083 Views

How to solve a quadratic equation by using the discriminant or by factoring?

A quadratic equations is a second-order equation with at most two solutions.The standard form of a quadratic equation looks like: ax2 + bx + c = 0 . For instance if we have the equation x2...

KH
Answered by Kader H. Maths tutor
1968 Views

Find the stationary points of the curve y=2*x^3-15*x^2+24*x+17. Determine whether these points are maximum or minimum.

First, differentiate and put the derivative equal to zero. dy/dx=6x^2-30x+24=0. Solve this equation to get that x=4 and x=1. Substitute these values into the original equation to get the correspo...

SM
Answered by Shaun M. Maths tutor
3911 Views

Why is the derivative of x^n, nx^(n-1)?

From the definition of a derivative: f'(x) = lim h->0 ((f(x+h) - f(x)) / h) Let f(x) = x^n --> d\dx x^n = lim h->0 (((x+h)^n - x^n) / h) By binomial expansion, (x+h)^n = x^n + nhx^(n-1) + n(n-1)h...

JF
Answered by Joshua F. Maths tutor
4225 Views

Show that 12coshx - 4sinhx = 4e^x + 8e^-x

Using the definitions of coshx and sinhx (coshx=1/2(e^x+e^-x) and sinhx=1/2(e^x-e^-x)), we can substitute these into what we want to show, giving 12(1/2(e^x+e^-x)) - 4(1/2(e^x-e^x)), expanding this out gi...

EW
Answered by Emily W. Maths tutor
3287 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences