Logs, Natural Logs And E - Casio FX-82AU PLUS Using Manual

The calculator uses g for log base 10 and h for log base e. You don't have to
remember which button is which. All you need to do is look at the second function above
each button. The g button has G above it reminding you that the g button is base
10. Similarly the h button has H above it. h is base e.
1 Use your calculator to evaluate each expression correct to 3 decimal places.
A log 105
10
D log 0.5
e
2 A Enter
log
B Explain why your calculator displays the message "Math ERROR".
3 Your calculator has two e buttons. You can find the value of e as the alpha
function on K. The value of e
on h.
A Determine the value of e using Q K p. Answer to 4 decimal places.
B Find the value of
1. Determine the following values correct to 2 decimal places.
2.5
A e
4 Calculate the values of the following expressions.
2
A log e
e
- 1
D log e
e
5 What is the value of log
6 Evaluate
800
7 Determine the value of
notation with 3 significant figures.
8 What is the value of e
Answers
1A 2.021 B 2.079 C 0.222
2 log x only exists for x > 0. 3A 2.7183 B 20.09 4A 12.18 B 0.37 C 2.72
5A 2 B 3 C 1 D 1
© Sue Thomson and Shriro Australia PTY Limited. This page may be photocopied for classroom use.
Logs, natural logs and
B log 8
e
(
E log 4.3 2.5
10
( )
- into your calculator.
1
e
x
3
e to 2 decimal places by pressing SHIFTh3.
- 1
B e
3
B log e
e
F log 100
10
n
e ? (You'll have to use your brain for this one!)
e
12 k
e when k = 0.4. Express your answer to the nearest hundred.
- 10 k
when k = 1.4.Express your answer in scientific
950 e
p
? Express your answer to 2 decimal places.
- D 0.693 -
- E 2 F 1 -
e
C log 0.6
10
)
´ F 4 log 209
e
can be determined by using the second function
C e
C log e
e
G log 10
10
E 1.031 F 21.369
6 n 7 97 200
- 1
- 4
8 7.90 10 ´ 9 8.54
29