Question

find the square of 3n,3n+1 and,3n+2​

Answer 1

Hey bro hope it helps u

Answer 2

Step-by-step explanation:

Therefore arithmetic mean is given by

n

1+3+3

2

+...+3

n−1

Sum of n terms of a geometric progression with a being the first term and r as the common ratio is given by

r−1

a(r

n

−1)

Here, a=1 and r=3

∴ arithmetic mean =

(3−1)n

1×(3

n

−1)

∴ arithmetic mean =

2n

3

n

−1