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We have been told that t = 5 in this particular question. So our first step is to simply 'swap out' the t in the above equation for the number 5, as we have been told they mean the same thing. This gives ...

Firstly, explain briefly what you understand from the question.

=> (x+5y)⁵ = (x+5y)(x+5y)(x+5y)(x+5y)(x+5y)

What would be the binomial expansion of form (x+y), brief explanatio...

A derivative is the result of an operation called differentiation. If we differentiate something, a function, the result tells us how much the function changes with respect to a chosen variable. For insta...

The important thing to note is that examiners always give the minimum amount of information for the question to still be answerable. If you have not used all the information then you probably haven't answ...

6a + 3b = 7 (1) 4a + 4b = 12 (2) We need to eliminate one of the variables in our simultaneous equations in order to be able to find a numerical value. As the same signs are used in both equations (i.e. a...