MCQ
Function $f(x)={\left( {1 + \frac{1}{x}} \right)^x}$ then Domain of $f (x)$ is
- A$(-1, 0) \cup (0, \infty )$
- B$R - { 0 }$
- ✓$(-\infty , -1) \cup (0, \infty )$
- D$(0, \infty )$
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$a x+2 a y-3 a z=1$
$(2 a+1) x+(2 a+3) y+(a+1) z=2$
$(3 a+5) x+(a+5) y+(a+2) z=3$
has unique solution and infinitely many solutions. Then