SOLUTION: Find the sum of this series: 3 + 6 + 12 + 24 + 48 + …; 10th term. a. 6742 b. 2455 c. 3069

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Question 1086937: Find the sum of this series: 3 + 6 + 12 + 24 + 48 + …; 10th term.
a. 6742
b. 2455
c. 3069
Found 2 solutions by MathLover1, MathTherapy:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

3 + 6 + 12 + 24 + 48 + …..; 10th term.
rule: where =,,...





now find next terms up to





---------------------
add all:

your answer is:
c.

Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!
Find the sum of this series: 3 + 6 + 12 + 24 + 48 + …; 10th term.
a. 6742
b. 2455
c. 3069
Sum of a GP, or , with:

 = Sum of "n" terms (Unknown, in this case)

 = 1st term (3, in this case)

  = Common ratio (2, in this case)

  = Number of terms (10, in this case)



 then becomes: , and then:

 

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