If x/y>0, which of the following must be true?

A xy>0
B (x-y)>0
C (x+y)>0
D None of these

Correct Answer: xy>0

xy <0 যেহেতু xy >0 তাই x < 0 অথবা y <0 এবং x ও y এর যেকোনো একটি অবশ্যাই অঋণাত্মক বা >০ হবে। । দুটি সংখ্যার বর্গের সমষ্টি কখন ও ঋণাত্মক হতে পারে না।
Bissoy MCQ
#গণিত #Oil &amp; Gas Co. Ltd #Bakhrabad Gas Co. Ltd - Asst. Manager (General) - 31.03.2017

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