Top answers

Pouvez-vous me dire quand utiliser "c'est" et "s'est"?

Beaucoup de français font encore cette faute d'orthographe. Savoir quelle forme choisir peut être difficile mais apprendre à faire la différence entre les deux formes est fondamentale étant donné que les élè...
AS
Answered by Alexandra S. • French tutor
2787 Views

How do you use the chain rule?

The chain rule is used to differentiate when there is a function within another function. For example y=(4x+6) 0.5 , y=(x+1) 3 The general formula for the chain rule is dy/dx= dy/du * du/dxAn example of this...
FC
Answered by Frances C. • Maths tutor
4200 Views

Find the turning value of the following function, stating whether the value is min or max, y = x^2 -6x + 5

First the student needs to differentiate the function to find dy/dx = 2x-6At dy/dx = 0, we know the curve is stationary. Now we can work out the x value such that x = 3Put x=3 back into the original equation...
JW
Answered by Joseph W. • Maths tutor
5149 Views

solve 3 cos (2y )- 5 cos( y)+ 2 =0 where 0<y<360 degrees

cos(2y)= (cos(y))^2 - (sin(y))^2 identitynow consider identity (cos(y))^2+(sin(y))^2=1by rearranging this to (cos(y))^2 - 1 = - (sin(y))^2 we can now substitute it into our first identity to obtaincos(2y)= 2...
LS
Answered by Leah S. • Maths tutor
4200 Views

Solve the Equation: 2ln(x)−ln (7x)=1

This is an equation laid out in terms of the natural logarithm, which essentially is the reverse function of e x . From this equation we need to find a solution for x =? Since we know that this equation invo...
DG
Answered by Dhruv G. • Maths tutor
6484 Views