Maths-
General
Easy
Question
Matrix Mr is defined as Mr=
, r
N. Then det. (M1) + det.(M2) + ........... + det.(M2009) = ?
- 2009
- (2009)2
- (2009)3
- None of these
The correct answer is: (2009)2
det.(Mr) = r2 – (r –1)2 = 2r –1
= 2 ×
– 2009
= (2009) × (2009) = (2009)2
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