Which number is a perfect cube? 25 36 125 300

Mathematics

2 answers:

slavikrds [6]3 years ago

7 0

125 has a cubed root of 5

therefore your answer being 125

Tresset [83]3 years ago

3 0

Answer:

125

Step-by-step explanation:

Out of the numbers given 125 is the perfect cube. Hopefully this helps, have a great day. :)

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Montano1993 [528]

Answer:

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7 0

3 years ago

determine if the sequence is geometric if it is find the common ratio the 8th term and the explicit formula can someone check my

mylen [45]

Answer:

You can check the answer by yourself after seeing the below answer.

Step-by-step explanation:

A sequence is geometric only if has common ratio i.e. $r=\frac{a2}{a1} =\frac{a3}{a2}$ whiere a1,a2 and a3 are first,second and third term of the sequence respectively.

1) Common ratio $r=\frac{-18}{-3}=\frac{-108}{-18}=6\\$

Explicit formula $a_{n} =a_{1} .r^{n-1}$

Now using the above formula, we can find $8^{th} term=-3*(6)^{8-1} =-3*6^{7}=-839808.$

2) Here

$\frac{a2}{a1}\neq \frac{a3}{a2}\\\frac{-2}{-4}\neq \frac{1}{-2}\\\frac{1}{2}\neq\frac{1}{-2}$ so this is not geometric sequence so no need to proceed further.