Texas Instruments TI-89 사용자 설명서

Operating the Calculator

145

Operating the Calculator

Turning the Calculator On and Off

You can turn your graphing calculator on and off manually by using the

´ and 2 ®

(or

8 ®) keys. To prolong battery life, the APD™ (Automatic Power Down™) feature

lets the calculator turn itself off automatically.

Turning the Calculator On

Press

´.

•

If you turned the unit off by pressing

2 ®, the unit returns to either the Apps

desktop or the Home screen.

•

If you turned the unit off by pressing

8 ® or if the unit turned itself off through

APD, the unit returns to whichever application you used last.