2 years ago

Which statement about these equations is true?

Mathematics

2 answers:

Juliette [100K]2 years ago

7 0

Answer:

Step-by-step explanation:

A:y=3x+4

Licemer1 [7]2 years ago

7 0

Answer:

4555555555555555

Step-by-step explanation:

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3 years ago

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Ganezh [65]

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Step-by-step explanation:

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3 years ago

Find the sum of a finite geometric sequence from n=1 to n=8, using the expression -2(3)^n-1

MissTica

$\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}
\end{cases}
\\\\\\
\sum\limits_{n=1}^{8}~-2(3)^{n-1}~~
\begin{cases}
n=8\\
a_1=-2\\
r=3
\end{cases}\implies S_8=-2\left( \cfrac{1-3^8}{1-3} \right)
\\\\\\
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3 years ago