NAME _______________ DATE _________ PERIOD ___ _

7-3 Skills PracticeLogarithms and Logarithmic Functions

Write each equation in exponential form.

1. log3 243 = 5

1 3. log9 3 = 2

Write each equation in logarithmic form.

Evaluate each expression.

11. log10 1000-: ')(

/OK

= /000

1 13. log4 64 = 'X

.u�- .J_ -, - I,#(

15. log8 512 = >C

?x

::: 5/ ,;)_ Graph each function.

LI_�::::- / LI 2. log4 64 = 3 l _ Co I

4. log5 2.=..:2 · / -� .... _j__ 25 -.,J - :J-..S-

6. 32 = 9 /oJ3

9 = �

/r,j(t) (!r )= 2-

10. log9 3 :::. ">'

9"= 312. log12s 5 '= X

,�s ><-::: s

r 16. log27 3 :: >C

V _J_ --�

3 :uc: .'.::

3�'

X- -L - 3 17 • .f{x) = log3 (x + 1)- 4 18 • .f{x) = - log5 x + 2.5

h=-l '(-;.-'/ a�, b-= 3

y-:. (bjsX (J, o) X-=O

y =- I oj3

(�+-t) (o)-41) x::. -l

Chapter 7 21

Y = /r,js�

(.l = -( -+ re f'lecf;o·'\

h::0

k:;. )...S

b= S

Y ::. ·- / OjS'X + !l..$" Glencoe Algebra 2