MCQ
Each diagonal element of a skew-symmetric matrix is
- ✓zero
- Bpositive
- Cnon-real
- Dnegative
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Statement $-2:$ The functions $x^2e^x$ and $x^2e^{-x}$ are increasing for all $x > 0$ and the sum of two increasing functions in any interval $(a, b)$ is an increasing function in $(a, b).$