Over a million students use our free study notes to help them with their homework
There is a subtle point to be made here, which comes down to double counting. The addition rule:Pr(A union B) = Pr(A)+Pr(B)-Pr(A intersection B)allows us to work out the probability that either event A or...
Take a general function f(x) = ax²+bx+c
First thing to do with every problem is sit back and think a bit: there are usually several ways to solve a problem but one will l...
To work out the number of roots a qudratic ax2+bx+c=0 you need to compute the discriminant (b2-4ac).
If the discrimant is less than 0, then the quadratic has no re...
The main methods of differentiation you need to know at A level are the chain rule, the product rule and the quotient rule.
The chain rule should be used when the eqation is a function of...
An integral is the area that lies below a graphed line and the x-axis, an indefinite integral is when an interval is not used, and so is often infinite, as it covers the entire area under a graph, and not...
←
678
679
680
681
682
→
Internet Safety
Payment Security
Cyber
Essentials