JEE MATHEMATICS MCQ: COMPLEX NUMBERS

1 Easy

1 of 1

Application +4 | -1

Let

Z=\left[\begin{array}{ll}7+5 i & 3+3 i \\ 8+5 i & 5+2 i\end{array}\right]

then

\operatorname{det}(Z \bar{Z})

, (where

\bar{Z}

is the matrix obtained by taking conjugate of each element of

Z

) is equal to

View answer and explanation

Correct option: A

256

Option A (256) is correct because the determinant of Z * conjugate(Z) is the square of the magnitude of the determinant of Z.

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