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Given that a=(23) and...

Given that a=(23) and b=(14), evaluate (2a14b)

A.

(1747)

B.

(1745)

C.

(1743)

D.

(1742)

Correct answer is B

a=(23)b=(14)

2×a=(46) and 14×b=(141)

\begin{pmatrix} \frac{17}{4} \\ 5 \end{pmatrix}