1
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

In a triangle, the sum of lengths of two sides is $$x$$ and the product of the lengths of the same two sides is $$y$$. If $$x^2-\mathrm{c}^2=y$$, where $$\mathrm{c}$$ is the length of the third side of the triangle, then the circumradius of the triangle is

A
$$\frac{\mathrm{c}}{3}$$
B
$$\frac{\mathrm{c}}{\sqrt{3}}$$
C
$$\frac{3}{2} y$$
D
$$\frac{y}{\sqrt{3}}$$
2
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The contrapositive of "If $$x$$ and $$y$$ are integers such that $$x y$$ is odd, then both $$x$$ and $$y$$ are odd" is

A
If both $$x$$ and $$y$$ are odd integers, then $$x y$$ is odd.
B
If both $$x$$ and $$y$$ are even integers, then $$x y$$ is even.
C
If $$x$$ or $$y$$ is an odd integer, then $$x y$$ is odd.
D
If both $$x$$ and $$y$$ are not odd integers, then the product $$x y$$ is not odd.
3
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

$$y=(1+x)\left(1+x^2\right)\left(1+x^4\right) \ldots \ldots \ldots\left(1+x^{2 n}\right)$$, then the value of $$\frac{\mathrm{d} y}{\mathrm{~d} x}$$ at $$x=0$$ is

A
0
B
$$-$$1
C
1
D
2
4
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

$$\lim _\limits{x \rightarrow 0} \frac{\cos 7 x^{\circ}-\cos 2 x^{\circ}}{x^2}$$ is

A
$$\frac{-45}{2} \pi^2$$
B
$$\frac{-45}{2} \pi$$
C
$$\frac{-\pi^2}{1440}$$
D
$$\frac{-\pi^2}{2880}$$
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