Which of the following is not true?

Important Questions on Relations and Functions

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $a^x=b^y=c^z=d^w$, the value of $x\left(\frac{1}{y}+\frac{1}{z}+\frac{1}{w}\right)$ is

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $2^x{.3}^{x+4}=7^x$, then $x$ is equal to

HARD

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $N=m!$ (where $m$ is a fixed positive integer $>2$), then $\frac{1}{{\log }_{2}N}+\frac{1}{{\log }_{3}N}+\frac{1}{{\log }_{4}N}+\mathrm{.....}+\frac{1}{{\log }_{m}N}=$

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

For which of the following values of $\text{'}x\text{'},$ does the function $f\left(x\right)=\log \left[\left\{\sqrt{\left(25-x^2\right)}\right\}/\left(2-x\right)\right]$have the real values?

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $3^{x+1}=6^{{\log }_{2}3}$, then $x$ is:

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

The common difference of A.P. ${\log }_{2}2, {\log }_{2}4, {\log }_{2}8$ is

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

${\log }_7{\log }_7\sqrt{7\sqrt{7\sqrt{7}}}$ is equal to

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

$\log 9+\log 5$ is expressed as ...............

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $a={\log }_{2}3,b={\log }_{2}5$ and $c={\log }_{7}2$, then ${\log }_{140}63$ in terms of $a,b,c$ is

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If ${\log }_{2}6+\frac{1}{2x}={\log }_2\left(2^{\frac{1}{x}}+8\right)$ then the values of $x$ are

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

${\log }_{10}0.001=$ _____

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

The logarithm of $\frac{1}{256}$ to the base $2\sqrt{2}$ is

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $\log \left(x{y}^2\right)-\log y=\log \left(x+y\right)$, then find the value of $y$ in term of $x$.

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

The value of ${\log }_{2}32=$

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If ${\log }_a\left(\sqrt{3}\right)=\frac{1}{6}$ find the value of '$a$'

EASY

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If $S=\frac{1}{2}\left(\frac{1}{2}+\frac{1}{3}\right)-\frac{1}{4}\left(\frac{1}{2^2}+\frac{1}{3^2}\right)+\frac{1}{6}\left(\frac{1}{2^3}+\frac{1}{3^3}\right)\dots \dots \dots$ then $S=$

HARD

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If ${\mathrm{3}}^x=4^{x-1}$, then $x =$

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

The solution of the equation $3^{{\log }_{a}x}+3x^{{\log }_{a}3}=2$ is given by

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

If  ${\log }_{\sqrt{3}} x+{\log }_{\sqrt[3]{5}} x+{\log }_{\sqrt[4]{5}} x+......$  up to $7$ terms $=35$, then the value of $x$ is :

MEDIUM

Mathematics>Algebra>Relations and Functions>Logarithmic Function and its Properties

The value of ${\left({\left({\log }_{2}9\right)}^2\right)}^{\frac{1}{{\log }_2\left({\log }_{2}9\right)}}\times {\left(\sqrt{7}\right)}^{\frac{1}{{\log }_{4}7}}$ is