3 years ago

What is the approximated answer for:t{39}

Mathematics

2 answers:

WITCHER [35]3 years ago

3 0

It’s 40 because it’s closer to 40 than 30

MArishka [77]3 years ago

3 0

Answer:

please mark me in the brainlist

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A) show that $n(2n + 1)(7n + 1)$ is divisible by 6 for all integers $n$.

goldenfox [79]

Hi,

A)
$\dfrac{n(2n+1)(7n+1)}{6} \\

= \dfrac{14n^3+9n^2+n}{6} \\

= \dfrac{12n^3+6n^2}{6} + \dfrac{2n^3+3n^2+n}{6} \\

=2n^3+n^2+ \dfrac{n(2n^2+3n+1)}{6} \\

= 2n^3+n^2+ \dfrac{n(n+1)(2n+1)}{6} \\

= 2n^3+n^2+ 1^2+2^2+3^2+...+n^2\ is\ an\ integer.
$

B)
Only if n=4*k or n=4*k+1 , k beeing an integer.

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3 years ago

which unit of measure would be the most appropriate to measure the capacity of a bottle of nail polish?

anzhelika [568]

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3 years ago

Please I need Answer ASAP

8_murik_8 [283]

Answer:is B

Step-by-step explanation:

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