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Levels Tought:
Elementary,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 352 Weeks Ago, 5 Days Ago |
| Questions Answered: | 20103 |
| Tutorials Posted: | 20155 |
MBA, PHD
Phoniex
Jul-2007 - Jun-2012
Corportae Manager
ChevronTexaco Corporation
Feb-2009 - Nov-2016
hello, about question 6
The solutions seems difficult for me to understand
Please could you resolve it again by easier way??
Also the question ask to do by tow sides because it is "if and only if", and you did just one side.
Thank you
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