100 points!!!!!! anyone who says "I don't know" or "Ii don't care" WILL be dealt with by a moderator I need someone to give me a
2 answers:
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Recall that
There are three cases to consider:
(1) When
, we have 
and 
, so
(2) When
and 
, we get 
and , so
(3) When
, we have and 
, so
So
There are three cases to consider:
(1) When
(2) When
(3) When
So