Sharp EL-531LH - Page 37

34 Mastering the Calculator using the Sharp EL-531LH
To find the value of a, the keystrokes are:
The display should read 4.3219281.
So, . Confirm this by using the key.
Example 2
Given , find the value of y
The key is above the log key. Hence the keystrokes are:
The display should read 38.370725
Example 3 (harder)
Given , find the value of x
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
l
og2 log20
log 2 log 20
log 20
log 2
a
a
a
=
⇒ =
⇒ =
4.32
220
≈
log y 1.584=
log y 1.584=
y⇒ 10
1.58
4
=
1
0
x
log
x
61.5=
log 6 1.5
log6
1.5
log
log6
log
1.5
x
x
x
=
⇒ =
⇒ =
0.5187675
10x =