лабораторная работа / 1

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>> %-- 12:09 AM 9/15/07 --%

>> A=[6 -9 5 1; 0 7 -5 -1; 5 -5 2 4; 3 9 1 6]

A =

6 -9 5 1

0 7 -5 -1

5 -5 2 4

3 9 1 6

>> B=[124; -54; 83; 45]

B =

124

-54

83

45

>> x=A\B

x =

11.5106

-0.4683

9.9879

0.7825

>> disp(B')

124 -54 83 45

>> disp(B*3)

372

-162

249

135

>> disp(B+3)

127

-51

86

48

>> disp(B.^3)

1906624

-157464

571787

91125

>> disp(A')

6 0 5 3

-9 7 -5 9

5 -5 2 1

1 -1 4 6

>> disp(A^3)

937 -1568 1198 787

-497 640 -590 -475

728 -758 688 590

238 642 -230 72

>> disp(logm(A))

1.6358 + 0.0386i -1.2569 - 0.0367i 0.5581 - 0.0859i -0.0663 + 0.0307i

0.0582 - 0.4535i 2.0371 + 0.4320i -0.5363 + 1.0094i -0.1251 - 0.3605i

0.4915 - 0.9974i -0.4930 + 0.9501i 1.4755 + 2.2198i 0.3918 - 0.7928i

0.6577 + 0.5677i 1.4327 - 0.5408i -0.0395 - 1.2634i 2.0399 + 0.4512i

>> disp(sqrtm(A))

2.3154 + 0.0203i -1.6700 - 0.0194i 0.8673 - 0.0453i 0.0322 + 0.0162i

0.2008 - 0.2391i 2.5463 + 0.2278i -1.1783 + 0.5322i -0.0495 - 0.1901i

1.1427 - 0.5259i -1.1270 + 0.5009i 1.0754 + 1.1704i 0.9114 - 0.4180i

0.5274 + 0.2993i 1.9968 - 0.2851i 0.5080 - 0.6661i 2.4521 + 0.2379i

>> p=[1 9 31 59 60]

p =

1 9 31 59 60

>> r=(roots(p))

r =

-4.0000

-3.0000

-1.0000 + 2.0000i

-1.0000 - 2.0000i

>> disp(poly(r))

1.0000 9.0000 31.0000 59.0000 60.0000

>> disp(polyval(p,3))

840

>> disp(polyder(p))

4 27 62 59

>> x=0:0.1:10;

>> y=sqrt(2xx.^2+1.2-cos(x))-1;

??? y=sqrt(2xx.^2+1.2-cos(x))-1;

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Error: ")" expected, "identifier" found.