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

$$\int \frac{x^2+1}{x^4-x^2+1} d x=\ldots \ldots$$

A
$\tan ^{-1}\left(\frac{x^2+1}{2}\right)+c$
B
$\tan ^{-1}\left(x^2\right)+c$
C
$\tan ^{-1}\left(2 x^2-1\right)+c$
D
$\tan ^{-1}\left(\frac{x^2-1}{x}\right)+c$
2
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If $x^y=e^{x-y}$, then $\frac{d y}{d x}$ at $x=1$ is ...........

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

If $A=\left[\begin{array}{cc}1+2 i & i \\ -i & 1-2 i\end{array}\right]$, where $i=\sqrt{-1}$, then $A(\operatorname{adj} A)=\ldots$

A
$-2I$
B
$2I$
C
$5I$
D
$4I$
4
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+2
-0

Which of the following statements is contingency?

A
$(p \vee q) \vee \sim q$
B
$(p \vee q) \wedge \sim q$
C
$(p \vee q) \vee \sim p$
D
$p \rightarrow(p \vee q)$
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