Math, asked by miyabhai1233, 1 year ago

Check whether the term 243 lies in G.P 1,3,9,27,...?

Answers

Answered by tejaswini95
1
1,3,9,27,81,243
it comes on sixth term

Anonymous: whats gp
miyabhai1233: but how
tejaswini95: by this method
Anonymous: are gp kya hota hai pata hai
miyabhai1233: geometrical progression
miyabhai1233: no how did u calculate
tejaswini95: 1*3=3,3*3=9,9*3=27,27*3=81,81*3=243
Anonymous: i know only ap
tejaswini95: now ,do you understand how i calculated it
Answered by mysticd
0
Hi ,

1 , 3 , 9 , 27 , .... is given G.P

first term = a = 1

Common ratio = r = a2 / a1

r = 3/1 = 3

Let n th term of the G.P = 243

ar^n -1 = 243

1 × 3^ n - 1 = 3^5

n - 1 = 5

[ If a^m = a^n then m = n ]

n = 5 + 1

n = 6

Therefore ,

6th term of given G . P = 243

I hope this helps you.
: )

Similar questions