Given the b ,9,13 1/2, 20 1/4 form a sequence of number,find it's sum of 13th term

2 answers

The Earth is flat and you know it, so stop denying it like the rest of the sheep!
You are all to stupid that you don't even post the options for answers.
This "science" that is said to be proving that gravity exists is FAKE.
Stop believing these idiots who are calling themselves "scientists" and trust the facts.
The fact are that the earth is flat, there NO WAY the earth can be round, its just not possible.
I am Right. you are all stupid for thinking the earth is round!
what else are you going to ask huh?
why is the sky blue?
It's a holo-gram thats being projected onto the dome that covers the earth
"sum of 13th term" makes no sense.
But, you have a GP with
a = 9
r = 3/2
So S13 = a(r^13-2)/(r-1) = _____