Question

अंकगणिती श्रेढी 3,5,7,9 साठी S27=?​

Answer 1

Answer:

Sum of 27 terms = 783.

Step-by-step explanation:

3,5,7,9,----

Given that first term (a) = 3 .

Common Difference (d) = term 2 - term 1 = 5-3 =2

Now we have to find 27th term =

a+(n-1)*d

= 3+(27-1)*2

= 3 + 26*2

= 3+52

= 55

Sum of 27 terms

= n/2 ( 1st term + last term )

= 27/2 * (3 +55)

= 27/2 * 58

= 27 *29

= 783 .