12. Without adding, find the sum :
(i) 1 + 3 + 5 + 7
Answers
Answered by
1
Answer:25
Step-by-step explanation:sum of first n odd no.=n^2
total consecutive odd no.=5
thus n = 5
thereforce sum=n^2
= 5^2
= 25
Answered by
0
Answer:
16
Step-by-step explanation:
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