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anastassius [24]
3 years ago
14

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

Mathematics
2 answers:
sukhopar [10]3 years ago
8 0

Answer:

(-1023)

Step-by-step explanation:

3+(-6)+12+(-24)+48+(-96)+192+(-384)+768+(-1536)

Andrews [41]3 years ago
8 0

Answer:

Step-by-step explanation:

a1=3

r=-6/3=-2

S_{10}=a1\frac{1-r^n}{1-r}\\ =3\frac{1-(-2)^{10}}{1-(-2)} \\=3\frac{1-1024}{3} \\=3\frac{-1023}{3} \\=-1023

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