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4.18. a(Afj = (x + y + z)i + 2^J + (y- 7 z )k, (p): 2x+3y +<br />

+ z — 6. (Ответ: —36.)<br />

4.19. a (M ) = (2 x -z)i + (y- x )j + (x+ 2z)k, (p): x-y +<br />

+ z = 2. (Ответ: 20/3.)<br />

4.20. a(A/) = (2y - z)i + (x + y)j + xk, (p): x + 2y+2z = 4.<br />

(Ответ: 8/3.)<br />

4.21. a(A/) = (2z-x)l + (x-,y)J + (3x + z)k, (p): x+y+<br />

+ 2z = 2. (Ответ: —2/3.)<br />

4.22. a (M ) = (x+ z)i + (x+ 3y)J + yk, (p): х+,у+2*“ 2.<br />

(Ответ: 8/3.)<br />

4.23. a(Af) = (x + z)I + ^J + (2x->')k, (p): 2x+2y+z = 4.<br />

(Ответ: 8/3.)<br />

4.24. a(Af) = (3x+,y)i + (x +z)j + y k , (p): x+2j» + z = 2.<br />

(Ответ: 2.)<br />

4.25. a(Af) = (y + z)i + (2x- z)j + O' + 3z)k, (p): 2x+y +<br />

+ 3z = 6. (Ответ: 18.)<br />

4.26. я (М ) = (у +z)i + (x+ 6y)j + y k , (p): x + 2 y+ 2 **2 .<br />

(Ответ: 2.)<br />

4.27. a(M) = (2y- z)i + (x + 2y)i+yk, (p): x+3y + 2z=6.<br />

(Ответ: 12.)<br />

4.28. Л(М) = (3>+ z)i + xj + Cv-2z)k, (p): 2x+2y+z = 2.<br />

(Ответ: —2/3.)<br />

4.29. л(М) = (x+z)i + zj + (2x -y)k, (p): 3x+2y + z-6.<br />

(Ответ: 6.)<br />

4.30. a(AO = zi + (x+jOJ + yk, (p): 2x+j» + 2z = 2. (О т­<br />

вет: 1/3.)<br />

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