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Maths
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How do I a differentiate a cosine function?

The differential is the slope of the graph at any point. So if we imagine a cosine in our heads, it starts at a peak and goes down to a negative peak. So in terms of the gradient (or slope) it starts at 0...

KH
Answered by Kieran H. Maths tutor
4269 Views

Define the derivative of a function f(x) and use this to calculate the derivative of f(x)=x^n for positive integer n.

f'(x)=lim(h->0) of [f(x+h)-f(x)]/h. In the case where f(x)=x^n, we have that f(x+h)-f(x)=h*nx^(n-1) + (h^2)*p(x) for a polynomial p(x), shown by binomially expanding f(x+h). Then dividing through by h ...

TD
Answered by Tutor302361 D. Maths tutor
3121 Views

How would you find the mean for the numbers 100, 230, 450, 120 and 250?

The first step would be to add all of the numbers together. In this example the sum of the numbers would be 1150. The second step would be to count how many numbers there are, so 100 would count as 1 numb...

JC
Answered by Jemilla C. Maths tutor
3434 Views

15/7 + 5/4

Find the lowest common denominator between the two fractions, which is 28 (74 = 28).Multiply the fractions numerator (15 and 5) by the same number that you have used to multiply the denominator when f...

AD
Answered by Allan D. Maths tutor
7058 Views

Given that f(x) = 1/x - sqrt(x) + 3. Find f'(1).

We are given that f(x) = 1/x - sqrt(x) + 3. Here, f(x) represents a function. A function is a relation or expression involving one or more variables. We are able to differentiate f(x) in order to find the...

Answered by Maths tutor
7467 Views

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