1
WB JEE 2020
+2
-0.5 Let $$f(x) = \sqrt {{x^2} - 3x + 2}$$ and $$g(x) = \sqrt x$$ be two given functions. If S be the domain of fog and T be the domain of gof, then
A
S = T
B
S $$\cap$$ T = $$\phi$$
C
S $$\cap$$ T is a singleton
D
S $$\cap$$ T is an interval
2
WB JEE 2019
+1
-0.25 Let $$f:R \to R$$ be defined by $$f(x) = {x^2} - {{{x^2}} \over {1 + {x^2}}}$$ for all $$x \in R$$. Then,
A
f is one-one but not onto mapping
B
f is onto but not one-one mapping
C
f is both one-one and onto
D
f is neither one-one nor onto
3
WB JEE 2019
+1
-0.25 Consider the function f(x) = cos x2. Then,
A
f is of period 2$$\pi$$
B
f is of period $$\sqrt {2\pi }$$
C
f is not periodic
D
f is of period $$\pi$$
4
WB JEE 2019
+2
-0.5 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
WB JEE Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
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