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Titun (1467)

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Hiii dfgdf,
 
Take some examples when some of the quantities are positive or negative, all of them are positive or negative.
 
I will just try to give  you an outline,
a/c - b/d > 0  i.e (ad - bc )/cd > 0
Take the following cases and the criteria that a>b , c>d
1. ad - bc > 0 with c,d of the same sign ( i.e c,d both positive or negative)
2. ad - bc < 0 with c,d of the opposite sign (i.e c >0 and d < 0, the converse is not true according to our criteria)
 
I'm sure you will be able to proceed further on yourself. If you face any difficulties plz let me know !!!1

You never know what is enough till you know what is more than enough. Titun
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