without adding find the sum 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23
Answers
Answered by
2
Answer:
144...................
Answered by
4
Answer:
144
Step-by-step explanation:
using progression formula
S=(n/2)(2a-(n-1)d)
n — number of terms=12
a —first term=1
d —common difference=3-1=2
placing values: S= (12/2)(2×1+(12-1)2)
on solving you get 144
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