Аналитическая геометрия. Часть III. Многомерные пространства. Гиперповерхности второго порядка. Шурыгин В.В. - 93 стр.

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1
◦
. (x
1
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2
+ (x
2
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2
+ (x
3
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2
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2
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1
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2
+ (x
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2
+ (x
3
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4
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3
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. (x
1
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2
+ (x
2
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2
− (x
3
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2
− (x
4
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2
= 0 (
)
4
◦
. (x
1
)
2
+ (x
2
)
2
+ (x
3
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2
( )
5
◦
. (x
1
)
2
+ (x
2
)
2
− (x
3
)
2
( )
6
◦
. (x
1
)
2
+ (x
2
)
2
= 0 (
x
1
= x
2
= 0)
7
◦
. (x
1
)
2
− (x
2
)
2
= 0 (
)
8
◦
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1
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2
= 0 ( )
P
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A
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\ P
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3
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5
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2
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3
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5
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5
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bghi‚) 
                                                      u       v      n
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   5◦ . (x1 )2 + (x2 )2 − (x3 )2 ( kmqmhikmbbjt gbasmh jt egkmfrbghi‚) 
                                                   v u           v
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kmqmhikmbbgu eftdgu x1 = x2 = 0) 
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himu) 
                                     n            v u
   8◦ . (x1 )2 = 0 ( ejfj hgkej j{qar eogh ghim ) €
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