Автор - milinamou

задания прикреплены, решите, что сможете

Ответ

Автор - Ellenochka
будут вопросы - пиши

Ответ

Автор - nKrynka
Часть  С

9) 

1)  [(b0,5 + 3)2  - (b0,5  - 3)2 ] /  [b*[(b0,5 + 3)  * (b0,5  - 3) ] = [b + 6b0,5 + 3
- b + 6b0,5 – 3] / b*(b – 9) =


= 12b0,5
/ b*(b – 9) = 12/
√b(b – 9)


2)  [12/b0,5(b – 9)] * (b – 9)/b0,5
= 12 / b


 

10)  (9x2 – 6x + 1) = x2  + 1

(√(9x2 – 6x + 1) )2
= (x2  + 1)2


9x2
– 6x + 1 = x4 + 2x2  + 1


x4
- 7x2  + 6x = 0


x(x3
– 7x + 6) = 0


x1
= 0


x3
– 7x + 6 = 0


x2
= 1


  x3  – 7x    +
6                                  Ix
- 1

-(x3 – x2
)                                             x2
+ x - 6

          x2 – 7x

        -(x2 – x)

                 - 6x + 6

                -(-6x + 6)
                           0


x3
– 7x + 6 = ( x – 1)( x2 + x – 6)


     x2 + x – 6 = 0

x4 = 2

Ответ:         x1 = 0; x2 = 1; x3 =
- 3; x4 = 2


 

 

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