Question

find the sum of integer between 10 and 500 which are divisible by 7​

Answer 1

$\:\:\:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \huge\mathcal{\bf{{\underline{\underline{\huge\mathcal{...Answer...}}}}}}$

$\large\mathcal\red{solution}$

the integer between 10 to 500 divisible by 7 is

14,21,28,35,......

now

=500/7=71.42

the last term should be =71×7=497

now let the n'th term is 497

therefore

497=14+(n-1)7

(497-14+7)/7=n

n=70

therefore sum of 70 terms is

$s(70) = \frac{70(14 + 497)}{2} \\ = 17885$

the sum is 17885

$\underline{\large\mathcal\red{hope\: this \: helps \:you......}}$

Answer 2

Answer:

answer is 17885

Step-by-step explanation:

i hope it's helpful for you