Question

the sum of all odd number between200 and 300​

Answer 1

Step-by-step explanation:

The odd numbers between 200 to 300 are

201,203,205,...,299

First term of the AP is 201 and common difference is 2.

Total odd numbers between 200 to 300 are 50.

Sn=n/2[2a+(n-1)d]

Where, n is the total number of terms, a is first term and d is common difference

S{50}=50/2[201+(50-1)]

S_{50}=25[402+98]

=25[402+98]

S{50}=25\times 500S

50

=25×500

S_{50}=12500

=12500

Therefore the sum of all odd numbers between 200 and 300 is 12500.

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