WB JEE 2011 | Logarithms Question 7 | Mathematics

WB JEE 2011

MCQ (Single Correct Answer)

-0.25

If $${\log _7}2 = \lambda $$, then the value of $${\log _{49}}(28)$$ is

$$(2\lambda + 1)$$

$$(2\lambda + 3)$$

$${1 \over 2}(2\lambda + 1)$$

$$2(2\lambda + 1)$$

WB JEE 2011

MCQ (Single Correct Answer)

-0.25

The sequence log a, $$\log {{{a^2}} \over b}$$, $$\log {{{a^3}} \over {{b^2}}}$$, ...... is

a G.P.

an A.P.

a H.P.

both a G.P. and a H.P.

WB JEE 2022

MCQ (Single Correct Answer)

-0.5

If x satisfies the inequality $${\log _{25}}{x^2} + {({\log _5}x)^2} < 2$$, then x belongs to

$$\left( {{1 \over 5},5} \right)$$

$$\left( {{1 \over {25}},5} \right)$$

$$\left( {{1 \over 5},25} \right)$$

$$\left( {{1 \over {25}},25} \right)$$

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

If 2 log(x + 1) $$ - $$ log(x² $$ - $$ 1) = log 2, then x =

only 3

$$ - $$1 and 3

only $$ - $$1

1 and 3

WB JEE Subjects