Answers

  • Brainly User
2015-01-22T21:45:42+05:30
Here a = 3 and r = 6/3 = 2. Let the number of terms be n.
Then, t = 384 => a * r^(n-1) = 384
=> 3 * 2^(n-1) = 384 => 2^(n-1) = 128 = 2^(7)

=> n-1 = 7 => n = 8.
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2015-01-22T21:46:57+05:30


Let n be the numbers in this G.P where a=3 & r=6/3 =2

Last term,tn = 384

⇒ a*r^(n-1) =  384

3*2^(n-1) = 384

2^(n-1) = 128 = 2^7

(n-1) = 7

Hence number of terms = 7+1=8

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