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Q.

If a1<a2<a3<a4<a5<a6, then the equation xa1xa3xa5+3xa2xa4xa6=0 has

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a

one root is a1,a2

b

three real roots

c

one root is a5,a6

d

a root in ,a1

answer is A, D.

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Detailed Solution

fa1=3a1a2a1a4a1a6 is +ve f(a2) = is  +ve; fa4= is -ve; fa5= is -ve; fa6= is +ve; 

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