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CUET
General Test
Quantitative Reasoning
Simplification
The factorisation of (lm + l) + m + 1 is
(l + 1)(m + 1)
(l – 1)(m – 1)
(l + 1)(m – 1)
(l – 1)(m + 1).
(lm + l) + m + 1
= l ( m + 1 ) + 1 ( m + 1 )
= ( l + 1 ) . ( m + 1 )