Sharp EL-531LH Mastering Instructions page 37

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Mastering the Calculator using the Sharp EL-531LH
=
a
log 2 log 20
⇒ =
a log 2 log 20
log 20
⇒ =
a
log 2
To find the value of a , the keystrokes are:
The display should read 4.3219281.
≈
4.32
So, . Confirm this by using the
2 20
Example 2
Given log y = 1.584 , find the value of y
log y = 1.584
⇒
1.584
y = 10
x
The 10 key is above the log key. Hence the keystrokes are:
The display should read 38.370725
Example 3 (harder)
Given log , find the value of x
6 = 1.5
x
=
log 6 1.5
x
log 6
=
⇒
1.5
log x
log 6
⇒ =
log x
1.5
To find log x , the calculator keystrokes are:
The display should read 0.5187675.
Since this is the value of log x , you still need to find x where
To utilize the answer of 0.5187675 on your display, use the stored ANSwer key
(which is above the = key). Press
key.
x =
0.5187675
10