Math, asked by abhishekpai65, 9 months ago

21. If 1 + 2 + 3 + ............... + n = 78, then the value of n
is :
(a) 13
(b) 12
(c) 11
(d) 16

Answers

Answered by AHQ

0

Step-by-step explanation:

(a)13 is the right answer

Answered by neetsahir78

0

Answer:

options are wrong ans is 3081.

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