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bmwhype2
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how can i estimate the value of a sqrt let say, sqrt .18 14 Nov 2007, 15:30
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how can i estimate the value of a sqrt


let say, sqrt .18



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how can i estimate the value of a sqrt let say, sqrt .18 14 Nov 2007, 16:04
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bmwhype2
how can i estimate the value of a sqrt


let say, sqrt .18
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Use ones you know, and see which side of it they are, then try out something else according to where your answer comes out.

so 0.18 ... 0.4 x 0.4 = 0.16... so need a bit more - 0.42 x 0.42 is about 0.1764...

So we can guess it's about 0.42-0.425 or so... a little inelegant but you can pretty quickly get to an approximation - if you mean a precise estimate.. I'm not sure
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how can i estimate the value of a sqrt let say, sqrt .18 14 Nov 2007, 17:05
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Alternatively sqrt 18 = sqrt 9*2 = 3*sqrt2 = 3*1.4142 = 4.2426

Amar
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how can i estimate the value of a sqrt let say, sqrt .18 18 Nov 2007, 04:47
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Amardeep Sharma
Alternatively sqrt 18 = sqrt 9*2 = 3*sqrt2 = 3*1.4142 = 4.2426

Amar
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lol. you solved for a different number. i said .18 not 18
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how can i estimate the value of a sqrt let say, sqrt .18 18 Nov 2007, 04:47
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alrussell
bmwhype2
how can i estimate the value of a sqrt


let say, sqrt .18

Use ones you know, and see which side of it they are, then try out something else according to where your answer comes out.

so 0.18 ... 0.4 x 0.4 = 0.16... so need a bit more - 0.42 x 0.42 is about 0.1764...

So we can guess it's about 0.42-0.425 or so... a little inelegant but you can pretty quickly get to an approximation - if you mean a precise estimate.. I'm not sure
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thanks. very helpful
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how can i estimate the value of a sqrt let say, sqrt .18 18 Nov 2007, 06:19
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sqrt(0.18) = aqrt (1/100 x 9 x 2 )= 1/10 x 3 x aqrt(2)
= (3 x 1.414)/10 = 0.424 ish
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how can i estimate the value of a sqrt let say, sqrt .18 18 Nov 2007, 06:56
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bmwhype2
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Alternatively sqrt 18 = sqrt 9*2 = 3*sqrt2 = 3*1.4142 = 4.2426

Amar

lol. you solved for a different number. i said .18 not 18
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True, but the sqrt of 18 and 0.18 should contain the same numbers, it's merely a matter of determining the decimal's location. It may be easier to determine the sqrt of a an integer than a fraction I suppose and then deduce the proper decimal.
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how can i estimate the value of a sqrt let say, sqrt .18 19 Nov 2007, 01:11
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Sorry for the mistake bmwhype2, but I agree with alrussel.

0.18 = 18*10^ -2 , and sqrt of this numbe will be sqrt18 * 10^ -1

Amar



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