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What is the "chain rule"?

The "chain rule" is a handy little tool that we can use to find the derivative of a complicated function. Specifically, we use the chain rule when we have functions within functions. But what does ...
JF
Answered by Joe F. • Maths tutor
4316 Views

2+2 is 4, minus 1, that's what?

Quick maths.
JF
Answered by Joe F. • Maths tutor
4917 Views

What are the different averages?

I spent some time working in a factory that made car parts recently and it is a good example of the different kinds of averages. This factory received about 100 orders a week. We could ship roughly 30 of the...
PF
Answered by Peter F. • Maths tutor
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https://revisionmaths.com/sites/mathsrevision.net/files/imce/1MA0_1F_que_20160526.pdf Question 5

So what I would do first, would be to write the probability of chosing each counter out of the bag. For example red is 3/6 => 1/2, green is 2/6 => 1/3, and blue is 1/6. Then 5a => 1/6 is worse than ...
LB
Answered by Leon B. • Maths tutor
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Find the values of the constants a and b for which ax + b is a particular integral of the differential equation 2y' + 5y = 10x. Hence find the general solution of 2y' + 5y = 10x .

We start by letting yp = ax+b, as suggested, and finding the derivative yp' = a. Substituing into ODE (by way of matching coefficients) gives a pair of simulataneous (algebraic) equations: (1) 2a=5b (2) -5a=...
BR
Answered by Ben R. • Maths tutor
5239 Views