1
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If $f(x)=3 x+6, g(x)=4 x+k$ and $f \circ g(x)=g \circ f(x)$ then $k=$

A
$-9$
B
18
C
$\frac{1}{9}$
D
9
2
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If the sum of an infinite GP be 9 and sum of first two terms be 5 then their common ratio is ..........

A
$\frac{1}{3}$
B
3
C
$\frac{2}{3}$
D
$\frac{3}{2}$
3
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

The negation of " $\forall, n \in N, n+7>6$ " is .............

A
$\exists n \in N$, such that $n+7 \leq 6$
B
$\exists n \in N$, such that $n+7 \geq 6$
C
$\forall n \in N, n+7 \leq 6$
D
$\exists n \in N$, such that $n+7<6$
4
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If the vectors $x \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+7 \hat{\mathbf{k}}$ and $\hat{\mathbf{i}}+y \hat{\mathbf{j}}-z \hat{\mathbf{k}}$ are collinear then the value of $\frac{x y^2}{z}$ is equal

A
$\frac{9}{7}$
B
$\frac{-9}{7}$
C
$\frac{-7}{9}$
D
$\frac{7}{9}$
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