Question

Find sum of numbers which are exactly divisible by 6 between 200 and 1000

Answer 1

ĀNSWĒR ⬆⬆


$Sn = \huge{ \frac{n}{2}}(a + an)$
✔Sn▶ sum of n terms


$\huge{an=a+(n-1)d}$


where

a▶first term of an A.P

d▶ common difference

an▶is the number which comes at the nth term of an A.P


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