1
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+2
-0.5
For all $$x \in \left( {0,1} \right)$$
A
$${e^x} < 1 + x$$
B
$${\log _e}\left( {1 + x} \right) < x$$
C
$$\sin x > x$$
D
$${\log _e}x > x$$
2
IIT-JEE 1999
MCQ (Single Correct Answer)
+2
-0.5
The function $$f(x)=$$ $${\sin ^4}x + {\cos ^4}x$$ increases if
A
$$0 < x < \pi /8$$
B
$$\pi /4 < x < 3\pi /8$$
C
$$3\pi /8 < x < 5\pi /8$$
D
$$5\pi /8 < x < 3\pi /4$$
3
IIT-JEE 1998
MCQ (Single Correct Answer)
+2
-0.5
The number of values of $$x$$ where the function
$$f\left( x \right) = \cos x + \cos \left( {\sqrt 2 x} \right)$$ attains its maximum is
A
$$0$$
B
$$1$$
C
$$2$$
D
infinite
4
IIT-JEE 1998
MCQ (Single Correct Answer)
+2
-0.5
If $$f\left( x \right) = {{{x^2} - 1} \over {{x^2} + 1}},$$ for every real number $$x$$, then the minimum value of $$f$$
A
does not exist because $$f$$ is unbounded
B
is not attained even though $$f$$ is bounded
C
is equal to 1
D
is equal to -1
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