the sum of 3+5+7+....+21
Answers
Answered by
1
Answer:
the sum of 3+5+7+11+13+17+19+21 is 96.
plz mark me brainliest !!!
Answered by
0
Answer:
Sn=n/2(a+l)
=10/2(3+21)
=5(24)
=120
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