1
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+2
-0

If $$A=\left[\begin{array}{ll}2 & 3 \\ 1 & 2\end{array}\right], \quad B=\left[\begin{array}{ll}1 & 0 \\ 3 & 1\end{array}\right]$$, then $$B^{-1} A^{-1}=$$

A
$$\left[\begin{array}{rr}-2 & -3 \\ -7 & 11\end{array}\right]$$
B
$$\left[\begin{array}{rr}2 & -3 \\ -7 & 11\end{array}\right]$$
C
$$\left[\begin{array}{rr}2 & 3 \\ 7 & 11\end{array}\right]$$
D
$$\left[\begin{array}{cc}-2 & -3 \\ -7 & -11\end{array}\right]$$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+2
-0

The domain of the function $$f(x)=\sqrt{x}$$ is

A
$$R$$
B
$$R^{+} \cup\{0\}$$
C
$$R-\{0\}$$
D
$$R^{+}$$
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+2
-0

$$\text { If } \sin (x+y)+\cos (x+y)=\sin \left[\cos ^{-1}\left(\frac{1}{3}\right)\right] \text {, then } \frac{dy}{dx}=$$

A
1
B
$$-$$
C
$$\frac{1}{2}$$
D
0
4
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+2
-0

The micro-organisms double themselves in 3 h. Assuming that the quantity increases at a rate proportional to it self, then the number of times it multiplies themselves in 18 yr is

A
32
B
64
C
40
D
128
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