Math, asked by amn98, 1 year ago

Find the sum of the following series? 2+3+5+6+8+9+.........+(3n-1)+(3n).​

Answers

Answered by sameer2739707
1

s=n/2 (a+l)

a, 2

l,3n

s=n/2 (2+3n)

s=2n+6n/2

s=8n/2

s=4n


amn98: can u solve it ri8
sameer2739707: kah ta dela
amn98: what?
sameer2739707: this is bhojpur language
amn98: i m also from bihar Jharkhand
sameer2739707: hehehe
sameer2739707: ok
sameer2739707: u can tell me some words in bhojpuri
amn98: kaa haal baa tohra kee
sameer2739707: thik ba aapan btaoa ka hot ba
Answered by brunoconti
3

Answer:

Step-by-step explanation:

Attachments:

amn98: don't understand your formulla method and specially Handwriting
sameer2739707: wait
amn98: sameer your Answer is wrong and Brunoconti Answer is right but i can't able to read his handwriting
sameer2739707: ok
brunoconti: tell me what you cant see or understand
amn98: i can't understand your formulla bro
amn98: because that is AP questions
amn98: And you are using K signs
brunoconti: i use the formula for 1 + 2 + 3 + ..... + n = n(n + 1)/2.
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