3 years ago

Determine 7th term in the geometric sequence whose first term is 5 and whose common ratio is 2.

1 answer:

7 0

$\bf n^{th}\textit{ term of a geometric sequence}
\\\\
a_n=a_1\cdot r^{n-1}\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=5\\
r=2\\
n=7
\end{cases}
\\\\\\
a_7=5\cdot 2^{7-1}\implies a_7=5\cdot 2^6\implies a_7=320$

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What two rational numbers are less than 1.6 but greater than -1.6

Harlamova29_29 [7]

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so then, what rationals are between -8/5 and +8/5? well, a huge amount hmmm let's pick two.

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