if a,b,c and d are four positive real no's such that the sum of a,b and c is even and the sum of b,c and d is odd then a^2 - d^2 is necessarily:-
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If a,b,c and d are four positive real no's such that the sum of a,b and c is even and the sum of b,c and d is odd then is necessarily:-
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Given:-
⇒ a+b+c = even number
⇒ b+c+d = odd number
⇔ remove b and c from both eq
⇔after removing b and c only and d is left..
⇔a is even and d is odd ..
⇒ a- d = even - odd = odd
⇒
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1
Answer:
Odd number
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