1
WB JEE 2008
MCQ (Single Correct Answer)
+1
-0.25

The function $$f(x) = \log \left( {{{1 + x} \over {1 - x}}} \right)$$ satisfies the equation

A
$$f(x + 2) - 2f(x + 1) + f(x) = 0$$
B
$$f(x) + f(x + 1) = f(x(x + 1))$$
C
$$f(x) + f(y) = f\left( {{{x + y} \over {1 + xy}}} \right)$$
D
$$f(x + y) = f(x)f(y)$$
2
WB JEE 2010
MCQ (Single Correct Answer)
+1
-0.25

For what values of x, the function $$f(x) = {x^4} - 4{x^3} + 4{x^2} + 40$$ is monotone decreasing?

A
0 < x < 1
B
1 < x < 2
C
2 < x < 3
D
4 < x < 5
3
WB JEE 2010
MCQ (Single Correct Answer)
+1
-0.25

The minimum value of $$f(x) = {e^{({x^4} - {x^3} + {x^2})}}$$ is

A
e
B
$$-$$ e
C
1
D
$$-$$ 1
4
WB JEE 2011
MCQ (Single Correct Answer)
+1
-0.25

The period of the function f(x) = cos 4x + tan 3x is

A
$$\pi$$
B
$${\pi \over 2}$$
C
$${\pi \over 3}$$
D
$${\pi \over 4}$$
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