Вариант 1 1.Решите показательные уравнения и неравенства:
a)2' = 32.b)3' + 3+1 = 4.c)52 -6.5'+ 5 = 0,
11«* (3)" (0)
2.Решите логарифмические уравнения и неравенства:
2
а) log. (? -6x) = 2,blog, (2x-1) = log, (х +x-3)
c) log, x + log.(-6) = 2,dlg'x-4lgx-5 = 0,
е) log, (3x-1)> logb(2-7х), Лlog, (4х+3)2-1.
3.Решите иррациональные уравнения и неравенства:
а)/4x+1= 4.b4x+1=х+ 3x-1,
с)4x+1=х-1,dx-12,e)2x-i>x-2.

My recent winter holidays were a lot of fun. I tried to visit as many places as I could and to do a lot of different things. Even though the weather wasn't very nice, it didn't make me feel sad. I went to the mall and to the skating-rink with my family and friends. It's always interesting to learn something new, so I also visited the movies and watched some great films. And then, of course, there were New Year and Christmas, which are both my favourite holidays. We had a gorgeous Christmas-tree decorated with toys and Christmas lights. On the first day of new year I got many presents from my family and relatives. After all, it was just great to take some time off from school and to sleep till noon. I really enjoyed my winter holidays.

1)3(2x-7)=9     2)6(z-1)=18     3)3(x-5)=x+3       4)50-7e-16=3e-16      5)Не могу понять!

    6x-21=9           6z-6=18           3x-15=x+3           -7e-3e=-16-50+16       

    6x=9+21          6z=18+6          3x-x=3+15           -10e=-50                         

    6x=30               6z=24               2x=18                  e=-5

    x=5                    z=4                    x=9                                                                                                               6)-(b+5)=16     7)-(4c-7)=5c+(11-7c)

    -b-5=16            -4c+7=5c+11-7c

    -b=16+5           -4c-5c+7c=11-7

    -b=21                -2c=3

                               c=1,5