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4 + 12 + 36 + … ; n = 15
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May 11, 2018
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4 + 12 + 36 + … ; n = 15
Mathematics
high-school
Logan Wayne
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I've attached a picture below of the formula for a finite geometric sequence. It includes an infinite geometric sequence formula for your reference, too.
Plug in the values.
S₁₅ =
28697812
Mohan Ramanathan
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May 13, 2018
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Mohan Ramanathan
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4 times 3=12
12 times 3=36
I think you want us to find the sum of the geometric sequence to n=15
the sum is
a1=first term=4
n=15
r=common ratio=3
S=-2(-14348906)
S=28697812
it adds to 28697812
Srneczek
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May 17, 2018
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Srneczek
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