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If P = \(\begin {pmatrix} 2 & 3\\  -4 &&nb...

If P = (2341), Q = (68) and PQ = k (4520). Find the value of k.

A.

-54

B.

-45

C.

45

D.

54

Correct answer is C

PQ = (2341) = (68)(3616)

(3616) = k = (4520)

k = 3645 

= 45