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What is the sum of the first 10 terms in this geometric sequence? 3,-6,12,-24

What is the sum of the first 10 terms in this geometric sequence? 3,-6,12,-24
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What is the sum of the first 10 terms in this geometric sequence? 3,-6,12,-24

What is the sum of the first 10 terms in this geometric sequence? 3,-6,12,-24-example-1
User Ben Botvinick
by
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2 Answers

5 votes
3(-2)= -6
-6(-2)= 12
12(-2)= -24
-24(-2)= 48
48(-2)= -96
-96(-2)= 192
192(-2)= -384
-384(-2)= 768
768(-2)= -1536

-1536 is the tenth term in this geo-sequence
User Prakash Thapa
by
9.3k points
2 votes
3,-6,12,-24,48,-96,192,-384,768,-1536

sum:
3 -6+12 -24+ 48 -96+ 192 -384+ 768 -1536 = -1023

Answer is C. -1023

User Fmaccaroni
by
7.9k points
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