Question

The sequence
$\sqrt{2} \: \sqrt{8} \: \sqrt{18}$….., 10 terms are in AP, then the sum of these terms is ______​

Answer 1

Answer:

It is an ap like :√2,2√2,3√2................. having common difference is √2 with first term √2.

Step-by-step explanation:

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

= 10/2[ 2×√2+9×√2]

= 5[11√2]

=55√2