2 years ago

The nth term of a sequence is n²+1. What is the 9th term?

Mathematics

1 answer:

Dimas [21]2 years ago

5 0

Replacing 9 for the nth term of the sequence we get 9^2 + 1 = 82, Therefore the 9th term is = 82

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You sure do have to read that a couple of times.

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Step-by-step explanation:

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2 years ago

<img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B80%7D%20" id="TexFormula1" title=" \sqrt[3]{80} " alt=" \sqrt[3]{80} " ali

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Start by decomposing the number inside the root into primes

Then group the terms into cubes if possible

$\begin{gathered} 80=2\cdot2\cdot2\cdot2\cdot5 \\ 80=2^3\cdot2\cdot5 \\ 80=10\cdot2^3 \end{gathered}$

rewrite the root

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then cancel the terms that are cubes and bring them out of the root

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