Question

equations of ap(arithmetic progression)​

Answer 1

Answer:

Equations:

{

a= first term

d= common difference

 l = last term

}

>To find the 'n'th term of the a.p.

$t_{n} = a + (n-1)d$

> To find the sum of 'n' number of terms of an a.p.

$Sum_{n} = \frac{n}{2} (2a + (n-1)d)$

> To find the sum of all the terms of an a.p.(when the last term is given)

$Sum_{n} = \frac{n}{2} (a+l)$

Step-by-step explanation: