2 years ago

HELP ME

Mathematics

2 answers:

BartSMP [9]2 years ago

8 0

Answer:

7.07?

Step-by-step explanation:

Mkey [24]2 years ago

8 0

Answer:

7.07 inches

Step-by-step explanation:

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What is 2∙ 2∙ 2∙ 2∙ 2∙ 2∙ 2∙ 2∙ 2 in exponential form?

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Answer:

$2^9$

Step-by-step explanation:

Since there are nine 2s being multiplied by each other, we can represent this as $2^9$ .

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2 years ago

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What is the first term in a geometric sequence if the common ratio is − 2 and the sum of the first six terms is −105?

Serggg [28]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
r=-2\\
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\end{cases}$

$\bf -105=a_1\left( \cfrac{1-(-2)^6}{1-(-2)} \right)\implies -105=a_1\left( \cfrac{1-(64)}{1+2} \right)
\\\\\\
-105=a_1\left( \cfrac{-63}{3} \right)\implies -105=a_1(-21)
\\\\\\
\cfrac{-105}{-21}=a_1\implies 5=a_1$

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greater

Step-by-step explanation:

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2 years ago

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Answer:

Step-by-step explanation:

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Step-by-step explanation:

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