3 years ago

What is the distance between-4 1/2 and -1 on number line

Mathematics

1 answer:

sergejj [24]3 years ago

6 0

Answer:

The difference between - 4 1/2 and -1 is -3 1/2

—4 1/2 --(—1)

— 4 1/2 + 1

— 3 1/2

Step-by-step explanation:

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3 years ago

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Answer:

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2 years ago

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What is the sum of the first 6 terms of this geometric sequence? –4, –16, –64, –256, …

MatroZZZ [7]

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The formula of the sum of a geometric sequence:

$S_n=a_1\cdot\dfrac{1-r^n}{1-r}$

We have:

$a_1=-4;\ n=6;\ r=4$

substitute:

$S_6=-4\cdot\dfrac{1-4^6}{1-4}=-4\cdot\dfrac{1-4096}{-3}=-4\cdot\dfrac{-4095}{-3}=-4\cdot1365=-5460$

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3 years ago