KEAM 2010 Math Paper

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Question : 59 of 120

Marks: +1, -0

For a,b∈R,‌‌ define ‌‌a*b=‌

a

a+b

,‌‌ where a+b≠0. If a*b=5, then the value of b*a is

5
-5
4
-7
-4

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