without adding find the sum1+3+5+7+...+23
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Answered by
2
A.P = 1,3,5,7....
where a = 1
n = 13
l = 23
sum=n/2 (a+l)
=13/2 (1+23)
=13/2(24)
=13×12
=156
Answered by
1
Step-by-step explanation:
1+3+5+7+9+11+13+15+17+19+21+23=12square
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