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MCQs on Engineering Mathematics

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01․ A square matrix is called singular if its
determinant is zero.
determinant is unity.
determinant is infinity.
rank is unity.

If the determinant of a square matrix is zero, then it does not have a matrix inverse. That means the matrix is said to be singular.
02․ If the solution of quadratic equation x2-11x+22 are x=3 and x=6, then the base of the number is
6
7
8
9

We know if a and b is the solution of a quadratic equation then we can write the equation as x2 - (a + b )x + ab = 0 By comparing this equation with the given equation ab = 2n + 2 Given a = 6 & b = 3 so, 18 = 2n + 2 → n = 8
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