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OpenStudy (anonymous):
True or false?
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OpenStudy (anonymous):
true
OpenStudy (anonymous):
-1<=x=<1
OpenStudy (anonymous):
true
OpenStudy (anonymous):
because all x that false
OpenStudy (anonymous):
But how?
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OpenStudy (anonymous):
1-cosx>=0 , true all x
OpenStudy (anonymous):
Oh, okay, thanks!! Let me give you a medal :)
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