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jrflower

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lurencyj

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2Â¥2012-03-16 23:27:13
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dbb627

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jrflower: ½ð±Ò+15, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2012-03-16 23:47:39
>> a=1:1000;
>> x=sqrt(13^2+a.^2);
>> Nx=find(x==fix(x))

Nx =

    84

>> sqrt(13^2+84^2)

ans =

    85
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
3Â¥2012-03-16 23:28:42
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

lurencyj

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jrflower: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú 2012-03-16 23:47:51
¹ý³Ì£º
CODE:
169+x^2=y^2
(y-x)(y+x) = 169 = 13*13 = 1*169
ÒòΪx,y(>x)ΪÕýÕûÊý£¬169·Ö½âÒò×ÓÖ»ÓÐÉÏÃæÁ½ÖÖ£¬ËùÒÔ£¬
x+y = 169
y-x = 1
½âµÃ£º x = 84, y = 85

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4Â¥2012-03-16 23:30:07
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jrflower

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by dbb627 at 2012-03-16 16:28:42:
>> a=1:1000;
>> x=sqrt(13^2+a.^2);
>> Nx=find(x==fix(x))

Nx =

    84

>> sqrt(13^2+84^2)

ans =

    85

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5Â¥2012-03-16 23:51:39
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