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y =(4x)/(x^2+5) (a) Find dy/dx, writing your answer as a single fraction in its simplest form. (b) Hence find the set of values of x for which dy/dx<0

dy/dx = 4/(x^2+5) - 4x(2x)/(x^2+5)dy/dx= 4(5-x^2)/(x^2+5)^2Part B4(5-x^2)/(x^2+5)^2<05-x^2<05<x^2

DK
Answered by Dominic K. Maths tutor
4035 Views

Translate the following passage into French:

I have not had a lot of free time recently because I must revise for my exams. However, I like to exercise to improve my health. At home, when I am not working, I use my computer in order to download musi...

JG
Answered by Justin G. French tutor
2148 Views

Factorise f(x)=3x^3+8x^2-20x-16 completely

First we need to use the factor theorem to find a factor.f(1)=-25 so x-1 is not a factorf(-1)=9 so x+1 is not a factorf(2)=0 so x-2 is a factorSo x-2 is our starting point, we need to polynomial division ...

LB
Answered by Luke B. Maths tutor
4441 Views

Solve the following simultaneous equations 7x - 6y =38 and 3x + 9y =-3

To solve these equations you first want to eliminate the same variable from each equation. In this question it is easiest to eliminate Y, to do this we will times equation 1 by 3 to get 21X-18Y=114 and eq...

IR
Answered by Isabelle R. Maths tutor
3063 Views

Examine the ways in which Henry VII responded to the problem of his consolidation of power in the years 1485 to 1490, and whether or not he was successful.

In order the understand Henry's technique in consolidating his power along with his level of success it must first be understood why this was such a big issue for him by considering the problems he faced....

KJ
Answered by Kate J. History tutor
4324 Views

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