Sharp EL-738 Notes page 11

2.5. CALCULATOR KEYS
• SQUARE ROOT:
√
Use the
x
Example:
√
Calculate 64.
Press 2 2ndF
The answer is 8.
Example:
√
3
Calculate 64.
Press 3 2ndF
The answer is 4.
Example:
√
4
Calculate 3
Press 4 2ndF
The answer is 2,28.
• NUMERIC FRACTIONS
Example:
3
−
Calculate
4
Press 3 ÷ 4 − 1 ÷ 2 =
The answer is 0.25.
1
Calculate +
2
Press 1 ÷ 2 + 2 ÷ 3 + 3 ÷ 5 =
The answer is 1,77.
• LOGARITHM to the base e: ln
Example:
Calculate ln 3.
Press 2ndF
The answer is 1,10.
Example:
Calculate ln
Press 2ndF ln ( 1 253 ÷ 1 479 =
The answer is −0,17.
√
x
key. 2ndF third key, forth row.
√ √
2
64 means 64.
√
64 =
x
√
64 =
x
3
√
3 2ndF
x
1
2
2 3
+
3 5
ln , (second key, second last row) 3 =
1 253
.
1479
x
y 3 =
17