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Questions and Answers
The arithmetic mean between roots of a quadratic equation is 8 and the geometric mean between them is 5. The equation is?
The arithmetic mean between roots of a quadratic equation is 8 and the geometric mean between them is 5. The equation is?
- $x^2 +16x + 25 = 0$
- $x^2 – 16x - 25 = 0$ (correct)
- $x^2 – 16x + 25 = 0$
- None of these
Solution space of the inequalities $2x + y < 10$ and $x-y < 5$:
Solution space of the inequalities $2x + y < 10$ and $x-y < 5$:
- Only (i) includes the origin
- Only (ii) includes the point (4,3)
- Both (i) and (ii) (correct)
- None of the above
If $A = \begin{pmatrix} 1 & -1 \ 1 & 1 \end{pmatrix}$, then $A.A$ is:
If $A = \begin{pmatrix} 1 & -1 \ 1 & 1 \end{pmatrix}$, then $A.A$ is:
- Identity matrix (correct)
- $A^2$
- Null matrix
- None of these
Find the Inverse of matrix $\begin{pmatrix} a & -b \ -c & d \end{pmatrix}$:
Find the Inverse of matrix $\begin{pmatrix} a & -b \ -c & d \end{pmatrix}$:
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Two equal sums were lent out. If one sum was lent at 6% per annum and the other at 7% per annum, both simple interests being equal, then each sum was:
Two equal sums were lent out. If one sum was lent at 6% per annum and the other at 7% per annum, both simple interests being equal, then each sum was:
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