Question

natural no. from 50 to 250 divisible by 6 d=6 a=54 find sn=? n=?​

Answer 1

Answer:

Given that:

a = 54

d = 6

And, we find that the highest number under 250 divisible by 6 is = 246

$\sf {a_{n} = a + (n-1)d}$

=》 246 = 54 + (n-1)6

=》 192 = (n-1)6

=》 32 = n-1

=》 n = 33

$\sf {s_{n} = \frac {33}{2} (2a + (n-1)d)}$

=》 $\sf {s_{n} = \frac {33}{2} (2 (54) + (33-1)6)}$

=》 $\sf {s_{n} = 4950}$

Hope it helps ya!