MCQ
Let $\phi (x) = (x) + {2^{\log _x^3}} - {3^{\log _x^2}}$ then
- ✓$\phi (2) = 2$
- B$\phi (1) = 0$
- C$\phi (-1.5) = 0.5$
- DNone
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$(A)$ radius of $S$ is $8$
$(B)$ radius of $S$ is $7$
$(C)$ centre of $S$ is $(-7,1)$
$(D)$ centre of $S$ is $(-8,1)$
$(\lambda-1) x+(3 \lambda+1) y+2 \lambda z=0$
$(\lambda-1) x+(4 \lambda-2) y+(\lambda+3) z=0$
$2 x+(3 \lambda+1) y+3(\lambda-1) z=0$
has non-zero solutions, is