Question

Find the sum of multiples of 3 between 200-900

Answer 1

There you go,

answer in attachment

Answer 2

Hey mate here's your answer.

Answer:128817.

Step-by-step explanation:

a=201,$l$=900

d=3

a+(n-1)d=900

Now, n=234

i.e. there is 234 terms b/w 200-900 divisible by 3....

Sum=$\frac{n}{2}$(a+l)

=$\frac{234}{2}$(900+201)

=117(1101)

=128817

Hope it helps you . ......