Question

PLEASE SOLVE IT FOR 15 POINTS
AND DONT SCAM
IF U DONT KNOW PLS LEFT IT FOR OTHERS
​

Answer 1

Answer: 15

Step-by-step explanation: i added a - it and i got my answer

Answer 2

The given series are 1+3+3square....+3n-1 is in G.P where.

first term,a1=1

common ratio r = a2/a1=3/1=3.

nTH term An =a power of n-1=3n-1

such of n terms,

Sn=a(r power of n-1) /r-1

=1(3power of n-1) /3-1

3 power n-1/2.

I THINK IT IS MORE USEFUL TO YOU