🛠️ JEE➗ Maths

Let \(A\) be a \(3 \times 3\) matrix with \(\operatorname{det}(A)=4\). Let \(R_i\) denote the \(i^{\text {th }}\) row of…

Q1

Let \(A\) be a \(3 \times 3\) matrix with \(\operatorname{det}(A)=4\). Let \(R_i\) denote the \(i^{\text {th }}\) row of \(A\). If a matrix \(B\) is obtained by performing the operation \(R_2 \rightarrow 2 R_2+5 R_3\) on \(2 A\), then \(\operatorname{det}(B)\) is equal to:

[JEE Main 2021, 25 Feb (Shift 2)]

a

64

b

16

c

128

d

80

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