Q.
If A=4x+22x−3x+1 is an invertible matrix, then x cannot take value
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a
-1
b
2
c
3
d
none of these
answer is D.
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Detailed Solution
|A|≠0⇒4(x+1)−(2x−3)(x+2)≠0⇒2x2−3x−10≠0⇒x≠3±894
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