1
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Let I(n) = nn, J(n) = 13.5 ......... (2n $$ - $$ 1) for all (n > 1), n $$ \in $$ N, then
A
I(n) > J(n)
B
I(n) < J(n)
C
I(n) = J(n)
D
I(n) = $${1 \over 2}$$J(n)
2
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Given that n numbers of arithmetic means are inserted between two sets of numbers a, 2b and 2a, b where a, b $$ \in $$ R. Suppose further that the mth means between these sets of numbers are same, then the ratio a : b equals
A
n $$-$$ m + 1 : m
B
n $$-$$ m + 1 : n
C
n : n $$-$$ m + 1
D
m : n $$-$$ m + 1
3
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
In a GP series consisting of positive terms, each term is equal to the sum of next two terms. Then, the common ratio of this GP series is
A
$${\sqrt 5 }$$
B
$${{\sqrt 5 - 1} \over 2}$$
C
$${{\sqrt 5 } \over 2}$$
D
$${{\sqrt 5 + 1} \over 2}$$
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