Практикум по алгебре. Часть 1. Многочлены и их корни. Попов В.В - 15 стр.

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d(x) f(x) g(x)
d(x) = f(x) · u(x) +
g(x) · v(x).
a) f(x) = x
4
+ 2x
3
x
2
6x 4,
g(x) = x
3
2x 1;
b) f(x) = x
4
+ 5x
3
+ 5x
2
8x 3,
g(x) = x
3
+ 5x
2
+ 4x 10;
c) f(x) = x
4
+ 2x
3
x
2
+ x + 6,
g(x) = x
3
2x + 4;
d) f(x) = x
5
+ x
4
6x
3
+ 2x
2
+ 7x + 3,
g(x) = x
4
7x
2
+ 7x + 3;
e) f(x) = x
5
2x
4
+ 4x
3
4x
2
+ 2x 1,
g(x) = x
4
x
3
+ 2x
2
x 1;
f) f(x) = x
5
4x
4
+ 8x
3
9x
2
+ 4x,
g(x) = x
4
2x
3
+ 3x
2
x 1.
a) d(x) = x + 1, u(x) = x 1, v(x) = x
2
+ 3x + 3;
b) d(x) = x 1, u(x) = x 3, v(x) = x
2
+ 3x + 1;
c) d(x) = x + 2, u(x) = x + 1, v(x) = x
2
+ x + 16;
d) d(x) = x + 3, u(x) = x + 2, v(x) = x
2
x 1;
e) d(x) = x 1, u(x) = x, v(x) = x
2
x + 1;
f) d(x) = x 1, u(x) = x, v(x) = x
2
2x + 1.
   4.5. Ïðåäñòàâèòü ÍÎÄ d(x) ìíîãî÷ëåíîâ f (x) è g(x) â âèäå
ëèíåéíîé êîìáèíàöèè ýòèõ ìíîãî÷ëåíîâ: d(x) = f (x) · u(x) +
g(x) · v(x).

           a)   f (x) = x4 + 2x3 − x2 − 6x − 4,
                g(x) = x3 − 2x − 1;
           b)   f (x) = x4 + 5x3 + 5x2 − 8x − 3,
                g(x) = x3 + 5x2 + 4x − 10;
           c)   f (x) = x4 + 2x3 − x2 + x + 6,
                g(x) = x3 − 2x + 4;
           d)   f (x) = x5 + x4 − 6x3 + 2x2 + 7x + 3,
                g(x) = x4 − 7x2 + 7x + 3;
           e)   f (x) = x5 − 2x4 + 4x3 − 4x2 + 2x − 1,
                g(x) = x4 − x3 + 2x2 − x − 1;
           f)   f (x) = x5 − 4x4 + 8x3 − 9x2 + 4x,
                g(x) = x4 − 2x3 + 3x2 − x − 1.


  Îòâåòû:

   a) d(x) = x + 1,    u(x) = −x − 1,     v(x) = x2 + 3x + 3;
   b) d(x) = x − 1,    u(x) = −x − 3,     v(x) = x2 + 3x + 1;
   c) d(x) = x + 2,    u(x) = −x + 1,     v(x) = x2 + x + 16;
   d) d(x) = x + 3,    u(x) = −x + 2,     v(x) = x2 − x − 1;
   e) d(x) = x − 1,    u(x) = −x,         v(x) = x2 − x + 1;
   f ) d(x) = x − 1,   u(x) = −x,         v(x) = x2 − 2x + 1.


5 Óíè÷òîæåíèå èððàöèîíàëüíîñòè â çíàìåíà-
  òåëå äðîáè
 ýëåìåíòàðíîé ìàòåìàòèêå èððàöèîíàëüíîñòü â çíàìåíàòåëå
äðîáè óíè÷òîæàþò ïóòåì óìíîæåíèÿ ÷èñëèòåëÿ è çíàìåíàòåëÿ

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