Find the sum of the first 20th term of the following A.P 2,4,6,8,10___+26
To find the sum of an arithmetic progression (A.P), we can use the formula:
Sn = n/2 * (a + l)
where Sn is the sum of the first n terms, a is the first term, l is the last term, and n is the number of terms.
In this case, a = 2 and l = 26. We need to find the sum of the first 20 terms, so n = 20.
Using the formula, we have:
Sn = 20/2 * (2 + 26)
= 10 * 28
= 280
Therefore, the sum of the first 20 terms of the given A.P is 280.