Question

6. Find the sum of all odd positive integers less than 450​

Answer 1

Answer:

the odd positive 8ntegers are

1,3,5,7,9,..........,449

• a=1
• l=449
• d=3-1=2

therefore.....

l=a+(n-1)*d

449=1+(n-1)*2

(449+1)/2=n

n=250

• therefore sum is

$s(250) = \frac{250(1 + 249)}{2} \\ s(250) = 31250 \: \: \: \: (answer)$