I suggest you calculate the first 2 or 3 derivatives, and see whether you can find a pattern.
It is not possible to find the nth term from the given information.
The nth term is n2 + 4n.
The Nth partial sum is the sum of the first n terms in an infinite series.
my nth term maths is very tuff because its syallabus is changed
You don't.
The first deriviative of sin(x) is cos(x), which is also sin(x + pi/2). The general formula, then for the nth deriviative of sin(x) is sin(x + n pi/2).
You will find several formulae in the Wikipedia article on "derivative".
The derivative at any point in a curve is equal to the slope of the line tangent to the curve at that point. Doing it in terms of the actual expression of the curve, find the derivative of the curve, then plug the x-value of the point into the derivative to find the derivative at that point.
Find the derivative of Y and then divide that by the derivative of A
209 nth ash
Find the formula of it.