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Урок по подготовке к ЕНТ PowerPoint PPT Presentation


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Урок по подготовке к ЕНТ. На тему «Логарифмы». Устная работа (Задания учащимся предлагаются по карточкам). Вычислить : log 100 1 = 49 log 7 5 = log 5 log 4 log 3 81 = 8 log 64 36 = =. Вычислить : = =

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Урок по подготовке к ЕНТ

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5927059


5927059

( )

:

  • log1001 =

  • 49 log7 5=

  • log5 log4 log3 81=

  • 8 log6436 =

  • =

:

  • =

  • =

  • =0


5927059

) ( )

1. log-14=2

2.

3.

) : ( ) :

1. 52+log52 =

2.

3.

4.

5. 2,6 log2,610+1

( )


5927059

) :

1.

2.


5927059

:

1)

x2-5-3+15<15

x2-8x<0

x2-8x=0

x(x-8)=0

x=0, x=8

:


5927059

+

+

-

0

8

2)

0<x< 8

: (5; 8 )

0

3

5

8


5927059

:

1)

.. 2x > 0 , b>0

2)


5927059

.

( , 2008)


5927059

1 :

2 :

3 :

:

( , , )


5927059

. , , 2008

,

,

,

,


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