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nick_sun
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What is the most effective method of adding or subtracting 26 Mar 2007, 07:26
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What is the most effective method of adding or subtracting different nth roots of a number? For example,



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BG
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What is the most effective method of adding or subtracting 26 Mar 2007, 10:00
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HI,
It is not easy to calculate bisqrt from 4 but
sqrt4=2
cubicrt4=1,..
bisqrt 4=1,...

So M is >4
hope it helps
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mavery
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What is the most effective method of adding or subtracting 26 Mar 2007, 14:08
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How were the answer choices formatted in this?

By decimal...like 4.1263478457093485703984750

or by root...like (4)^13/12

These are not necessarily the answers, I'm just trying to get an idea of the format you are looking for...
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kumarajeet06
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What is the most effective method of adding or subtracting 26 Mar 2007, 14:34
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sqrt of 4 is2
sqrt of 2 is 1.414
cube root of 4 will be just less than 1.6 as 1.6^3 =4.096

so sum is approximately4.014

I can't go more approximate than this

Please post if there is any other technique
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nick_sun
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What is the most effective method of adding or subtracting 26 Mar 2007, 15:33
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mavery
How were the answer choices formatted in this?

By decimal...like 4.1263478457093485703984750

or by root...like (4)^13/12

These are not necessarily the answers, I'm just trying to get an idea of the format you are looking for...
Show more


The answer choices were like greater than 4; between 3 and 4 etc.
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pi10t
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What is the most effective method of adding or subtracting 26 Mar 2007, 15:45
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nick_sun
mavery
How were the answer choices formatted in this?

By decimal...like 4.1263478457093485703984750

or by root...like (4)^13/12

These are not necessarily the answers, I'm just trying to get an idea of the format you are looking for...

The answer choices were like greater than 4; between 3 and 4 etc.
Show more


please, show the real answer choices and the full text of question.
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nick_sun
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What is the most effective method of adding or subtracting 27 Mar 2007, 06:42
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pi10t
please, show the real answer choices and the full text of question.
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Please see attached
Attachments

nth root.JPG
nth root.JPG [ 10.24 KiB | Viewed 1089 times ]

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Amardeep Sharma
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What is the most effective method of adding or subtracting 27 Mar 2007, 06:59
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Hi answer is E.

explanation sqrt 4 = 2, and 4 ^1/4 = sqrt2 = 1.41 approx

and 4^1/3 > 4^1/4, hence by adding all we have number greater than 4

regards,

Amardeep
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Amardeep Sharma
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What is the most effective method of adding or subtracting 27 Mar 2007, 07:01
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and the easy way is

non of the sqrt, cube root, and so on...of number greater than 1 will have value less than 1 hence M will be > 3. but we know that sqrt4 = 2

hence M will be > 4.

regards,

Amardeep
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What is the most effective method of adding or subtracting 27 Mar 2007, 08:47
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Amardeep Sharma
and the easy way is

non of the sqrt, cube root, and so on...of number greater than 1 will have value less than 1 hence M will be > 3. but we know that sqrt4 = 2

hence M will be > 4.

regards,

Amardeep
Show more


Good point, Amardeep. Thank you for the hint :)



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Thank you for understanding, and happy exploring!