Question

find the sum of all odd numbers between 351 and 373 - math

Answer 1

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Answer 2

HEY MATE YOUR ANSWER IS HERE !!!!

Smallest odd number between 351 and 373 =353
Greatest odd number between 351 and 373 = 371
First term = a 1 = 353
Common difference = 2 ( odd number only )

Find the number of term :
an = a 1 + ( n - 1 ) d
371 = 353 + ( n - 1 ) 2
371 = 353 + 2n - 2
371 = 351 + 2 n
2 n = 371 - 351
2 n = 20
n = 10

Find the sum :

sn = n / 2 ( a1 + an )
sn = 10 / 2 ( 353 + 37 )
sn = 3620

Answer : The sum of all odd number between 351 and 373 is 3620


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