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Properties of Logarithms

Total questions: 28

Worksheet time: 2hrs 59mins

Name
Class
Date
1.
Condense
a)
logxyz3
b)
log(xy/z3)
c)
logx+logy+logz3
d)
logx3y3z3
2.
Expand
a)
log8x+log8y+log8z
b)
5log8x+5log8y+5log8z
c)
log8xy+5log8z
d)
log8x+log8y+5log8z
3.
Expand
a)
A
b)
B
c)
C
d)
D
4.
Evaluate.
log381
a)
4
b)
1/4
c)
-4
d)
-1/4
5.
Expand
a)
A
b)
B
c)
C
d)
D
6.

Simplify: log⁡73+log⁡76\log_73+\log_76  

a)

log⁡79\log_79  

b)

log⁡7(12)\log_7\left(\frac{1}{2}\right)  

c)

log⁡7729\log_7729  

d)

undefined 

7.
Write logb(xy) as two logs
a)
logbx+logby
b)
logbx-logby
c)
logbx*logby
d)
logbx/logby
8.
Write logb(x/y) as two logs
a)
logbx-logby
b)
logbx+logby
c)
logbx*logby
d)
logbx/logby
9.
Rewrite logb(xn)
a)
nlogbx
b)
(logbx)n
c)
xnlogbx
d)
logb(xn)
10.
Write the expression as a single logarithm.   Then simplify if possible.
log53 + log56 + log59
a)
log569
b)
log556
c)
log5162
d)
log598
11.
Write the expression as a single logarithm.   Then simplify if possible.
log 6 - log 3 + 2 log 7
a)
log 98
b)
log 78
c)
log 56
d)
log 45
12.
Expand
a)
A
b)
B
c)
C
d)
D
13.
a)
6log8(xyz)
b)
log8(x) - log8(y) - 6log8(z)
c)
log8(x) + log8(y) - log8(z)
d)
log8(x) + log8(y) + 6log8(z)
14.
a)
log (a5 + b25)
b)
log (a5 − b25)
c)
log (ab25)
d)
log (a5/b25)
15.
Condense
a)
A
b)
B
c)
C
d)
D
16.
Condense
a)
logxyz3
b)
log(xy/z3)
c)
logx+logy+logz3
d)
logx3y3z3
17.
a)
log(x) + log(z) + 4log(y)
b)
3log(x) − log(z) − 4log(y)
c)
3log(x) + log(z) + 4log(y)
d)
log(x) − 4log(z) − 3log(y)
18.

Rewrite as a single logarithm:

log⁡3 + log⁡7\log3\ +\ \log7  

a)

log 10

b)

log 21

c)

log 3/7

d)

log 3/log 7

19.

Rewrite as a single logarithm:

log⁡260 − log⁡210\log_260\ -\ \log_210  

a)

log⁡26\log_26  

b)

log⁡250\log_250  

c)

log⁡260log⁡210\frac{\log_260}{\log_210}  

d)

log⁡270\log_270  

20.

Use the properties of logarithms to rewrite as the sum of two logarithms:

log⁡55\log55  

a)

log 40 + log 15

b)

log 50 + log 5

c)

log 11 + log 5

21.
Write in exponential form.
log232 = 5
a)
2-5 = 32
b)
232 = 5
c)
25 = 32
d)
325 = 2
22.
Rewrite 34 = 81 in logarithmic form.
a)
log34 = 81
b)
log813 = 4
c)
log381 = 4
d)
log481 = 3
23.
Solve for x
5x = 17
a)
x = log175
b)
x = log 5 + log 17
c)
x = log517
d)
x = (log 5)/(log 17)
24.
Expand
a)
A
b)
B
c)
C
d)
D
25.
Expand
a)
A
b)
B
c)
C
d)
D
26.

Write as a single logarithm:

log(30)-log(6)

a)

-6log(30)

b)

log(24)

c)

log(-24)

d)

log(5)

27.
Rewrite in exponential form:
ln(2) = x
a)
2x = 10
b)
102 = x
c)
ex = 2
d)
e2 = x
28.

Rewrite ex = 9 using a logarithm

a)

ln x = 9

b)

ln 9 = x

c)

logx e = 9

d)

log9 x = e