Math, asked by hiransnair03, 9 months ago


give me the answer fast i will mark u brilliant. with full explanation ​

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Answers

Answered by harshaag0332
0

Answer:

There are 20 odd numbers

Answered by shivanisindhwal085
0

Answer:

there are 20 odd no. between 1 to 40

Step-by-step explanation:

sum of series 1,3,5,7,.....39 is 400

Sn=n/2{2a+(n-1) d}

=20/2{2x1+(20-1)2}

=10{2+38}

=10x40

=400

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