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A group of 44 pupils were asked if they owned a phone or a tablet. 5 people are known to own both 3 said they only owned a tablet 17 said they owned at least a phone A student is picked a random, what is the probability that the student doesn’t have

So in this question, there are 4 main people in this question; those who own ONLY a phone, ONLY a tablet, both a phone or a tablet or NONE. How do you think we could represent this information? Prompt stu...

NC
Answered by Niki C. Maths tutor
3573 Views

Given that y = (3x^4 + x)^5, find dy/dx using the chain rule.

Let u = 3x4 + x
du/dx = 12x3 + 1
y = u5
dy/du = 5u4<...

Answered by Maths tutor
5371 Views

Given that f(x)= (4/x) - 3x + 2 find i) f'(x) and ii) f''(1/2)

This question is asking us to find the first order derivative of f(x) with respect to x, then the second order derivative when x=1/2i) Firstly, let's consider (d/dx)4/x:There are two ways to think about d...

VB
Answered by Verity B. Maths tutor
4977 Views

Show me why the product of a squared and a cubed is a to the power of 5.

When we find the product of two terms that has the same base (in this case, a), we can simply add the powers. This can be explained using knowledge of squares and cubed. a2 = a...

LM
Answered by Leon M. Maths tutor
6299 Views

expand (x-3)^2

firstly explain (x-3)2 = (x-3)(x-3) on the whiteboard I'd draw a square grid with each of the numbers, then I'd multiply out. E.g. x multiplied by x = x2; x multiplied by -3 = -3x an...

IT
Answered by Imogen T. Maths tutor
8650 Views

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