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г x (t)=0, ( ):
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l i ;
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- l = - a () ( 1) ;
- l = a () ( 2) ;
- l = 0 ( 3) .
: l = a j w (y (t)= ce a t sin (w t + j)
- l = -a j w- ( 1) ;
- l = a j w- ( 2) ;
- l = j w- , ( 3) .
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䒺, 䒺;
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( n > 4), , . ֳ.
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(1877.)
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n+1.
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0; 1; 2 ... .
b 0 = 2 - 0 3/ 1 = 2 - l 1 3; b 2 = 4 - l 1 5 ..
b 1 = 3 1 b 0 / b 2 = 3 - l 2 b 2; b 3 = 5 - l 2 b 4; b 5 = 7 l 2 b 6 ..
0= b 2 - b 0 b 3 / b 1 ..
: , .
:
44 + 73 + 52 + 3 + 1 = 0
+1=4+1=5
b0=5-4×3/7=23/7; b2=1-4×0/7=1; b1=3-7×1/23/7=20/23; b3= 0-0×49/23=0; C0 =1- 0×23/7 / 20/23=1
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(1895.)
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: 1 . , , . , > n < 0 0.
, , , 0.
D 0 =0 > 0; D 1 =1 > 0; ; ;...
D > 0.
:
5 +34 + 53 + 72 + 2 + 2 = 0
0 = 1 > 0; D1=3> 0; ;
D5=2D4=32> 0.
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, ( ), . . , , .