1
WB JEE 2019
MCQ (Single Correct Answer)
+2
-0.5
Change Language
Let a > b > 0 and I(n) = a1/n $$-$$ b1/n, J(n) = (a $$-$$ b)1/n for all n $$ \ge $$ 2, then
A
I(n) < J(n)
B
I(n) > J(n)
C
I(n) = J(n)
D
I(n) + J(n) = 0
2
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The domain of definition of $$f(x) = \sqrt {{{1 - |x|} \over {2 - |x|}}} $$ is
A
$$( - \infty , - 1) \cup (2,\infty )$$
B
$$[ - 1,1] \cup (2,\infty ) \cup ( - \infty , - 2)$$
C
$$( - \infty ,1) \cup (2,\infty )$$
D
$$[ - 1,1] \cup (2,\infty )$$

Here (a, b) $$ \equiv $$ {x : a < x < b} and [a, b] $$ \equiv $$ {x : a $$ \le $$ x $$ \le $$ b}
3
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
If f : R $$ \to $$ R be defined by f (x) = ex and g : R $$ \to $$ R be defined by g(x) = x2. The mapping gof : R $$ \to $$ R be defined by (gof) (x) = g[f(x)] $$\forall $$x$$ \in $$R. Then,
A
gof is bijective but f is not injective.
B
gof is injective but g is injective
C
gof is injective but g is not bijective
D
gof is surjective and g is surjective
4
WB JEE 2018
MCQ (Single Correct Answer)
+2
-0.5
Change Language
For 0 $$ \le $$ p $$ \le $$ 1 and for any positive a, b; let I(p) = (a + b)p, J(p) = ap + bp, then
A
I(p) > J(p)
B
I(p) $$ \le $$ J(p)
C
I(p) < J(p) in $$\left[ {0,{p \over 2}} \right]$$ and I(p) > J(p) in $$\left[ {{p \over 2},\infty } \right]$$
D
I(p) < J(p) in $$\left[ {{p \over 2},\infty } \right]$$ and I(p) > J(p) in $$\left[ {0,{p \over 2}} \right]$$
WB JEE Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12