Math, asked by chanchaldahankar, 8 months ago

if 1+2+3+------+n=
a.n\2(n+1) b.n/6(n+1)(2n+1)

Answers

Answered by sanatnayak2001
1

Answer:

n(n+1) /2

Step-by-step explanation:

option a

but u have written in wrong order

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