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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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1998
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If the operation $*$ is defined on $R$, the set of all real numbers, as $a*b = ab +1 \; \forall\; a, b \in R$ then $a * (b *c) $ is equal to :
( A ) abc + a +b+1
( B ) abc + a +1
( C ) a +bc +1
( D ) abc +1
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