Question

thesum of how many terms of the series 6 + 12 + 18 + 24 + .......... is 1800 ?​

Answer 1

Step-by-step explanation:

(6+12+18+24)-1800=Ur answer hope u can do the sum on ur own now plz mark as BRAINLIEST

Answer 2

Its an AP

a=6

d=6

Sn = n/2(2a+(n-1)d)

Just put the values in the formula.

You should get

n^2 + n - 600 = 0.

Now just solve for n by quadratic formula.

n = 24 or n= -25

Since n can't be negative, n = 24.