1
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Let ƒ and g be differentiable functions on R such that fog is the identity function. If for some a, b $$ \in $$ R, g'(a) = 5 and g(a) = b, then ƒ'(b) is equal to :
A
1
B
5
C
$${2 \over 5}$$
D
$${1 \over 5}$$
2
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
Out of Syllabus
Change Language
If the distance between the plane, 23x – 10y – 2z + 48 = 0 and the plane

containing the lines $${{x + 1} \over 2} = {{y - 3} \over 4} = {{z + 1} \over 3}$$

and $${{x + 3} \over 2} = {{y + 2} \over 6} = {{z - 1} \over \lambda }\left( {\lambda \in R} \right)$$

is equal to $${k \over {\sqrt {633} }}$$, then k is equal to ______.
Your input ____
3
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
Out of Syllabus
Change Language
If Cr $$ \equiv $$ 25Cr and
C0 + 5.C1 + 9.C2 + .... + (101).C25 = 225.k, then k is equal to _____.
Your input ____
4
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
Change Language
If the curves, x2 – 6x + y2 + 8 = 0 and
x2 – 8y + y2 + 16 – k = 0, (k > 0) touch each other at a point, then the largest value of k is ______.
Your input ____
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