3 years ago

(2 1/3 - 1 5/6) divided by ÷ 1 1/3

Mathematics

1 answer:

kenny6666 [7]3 years ago

4 0

Answer:

the answer is 10/22 when i calculated it

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Answer:

B, D

Step-by-step explanation:

The quadratic expands to ...

(2n -1)² = (2n)² +2(2n)(-1) +(-1)² = 4n² -4n +1

The coefficients can be factored out of the sum, so ...

∑(4n²) = 4∑n² for example

The sum of 60 ones is 60:

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So, the sum can be written as ...

$\displaystyle\sum_{n=1}^{60}{(2n-1)^2}\\\\=\boxed{4\sum_{n=1}^{60}{n^2}-4\sum_{n=1}^{60}{n}+\sum_{n=1}^{60}{1}}\\\\=\boxed{4\sum_{n=1}^{60}{n^2}-4\sum_{n=1}^{60}{n}+60}$

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lora16 [44]

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maks197457 [2]

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This is the correct answer. Hope this helps :)

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(2 1/3 - 1 5/6) divided by ÷ 1 1/3​

(2 1/3 - 1 5/6) divided by ÷ 1 1/3