Math, asked by ROYALFARDEEN, 1 year ago

7+8+9+10+11+.....+72+73plz give fast ans..

Answers

Answered by jogender77

1

D = 1
An = 73
A = 7

An = A + ( n - 1 ) d
73 = 7 + (n - 1) 1
66 = n. - 1
67 = n
Sn = n/2(a + An)
= 67/2(7+73)
= 67/2(80)
= 2680

ROYALFARDEEN: tnx a lot u save me

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