Question

find the sum of first 35 multiples of 3​

Answer 1

we want to find

3+ 6 +9+....35 terms

= 3(1 + 2 + 3 +.....35 terms)

= 3*35*(35+1)/2

= 3*35*36/2

= 3*35*18

= 1890

Answer 2

Hope it helps you plz mark as brilliant answer