please tell this question
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Answers
Answered by
1
Answer:
15
Explanation:
formula used: (n2 -n1)(n2-n1 +1)/2
where n2=6
and n1= 1
Answered by
1
Answer:
15
Explanation:
(n2-n1) (n2-n1+1)/2 where n2=6 and n1=1
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