Logarithmic Equations

IMPORTANT

Logarithmic Equations: Overview

This topic covers concepts, such as, Solving Logarithmic Equations, Solving Logarithmic Equations: with Constant Base & Solving Logarithmic Equations: with Variable Base etc.

Important Questions on Logarithmic Equations

EASY
IMPORTANT

If log2x=13.log28-2log23, then x is equal to

EASY
IMPORTANT

If logelog52x-2+3=0 then the value of x is-

EASY
IMPORTANT

The number of solutions of the equation, log-2x=logx2 is

MEDIUM
IMPORTANT

Number of real values of x which satisfy log2x2+log2x+2=4 is/are

EASY
IMPORTANT

If 1-log105=13log1012+log10x+13log105 then x is equal to

EASY
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log8+log8x2+x-2=43 ,  then x is equal to-

MEDIUM
IMPORTANT

Let x, y be real numbers such that x>2y>0 and 2logx-2y=logx+logy. Then the possible value(s) of xy

HARD
IMPORTANT

If log2x+36x2+23x+21=4-log3x+74x2+12x+9, then the value of 64x2 is

MEDIUM
IMPORTANT

Which of the following is not the solution of log10x2-2x+10+log101x2-2x=1-log10x2-2x?

HARD
IMPORTANT

The number of integral value of x satisfying the equation log3x-2-log3x-2=2 are

MEDIUM
IMPORTANT

Number of real values of x which satisfy log2x2+log2x+2=4 is/are

HARD
IMPORTANT

If logyx+ logxy= y, then  x + y =

HARD
IMPORTANT

If  alogbx25xlogba+6=0 where a>0,b>0 &b1, then the value of x can be equal to

HARD
IMPORTANT

For the equation 1+ logx4-x10=(log10(log10p)-1) logx10 , match the value of p

given in column-II corresponding to the number of solutions given in column-I.
 

Column-I Column-II
(A) for no solution (P) undefined
(B) for exactly one solution (Q) undefined
(C) for two distinct solutions (R) undefined
  (S) undefined , )

HARD
IMPORTANT

The number of solutions in 2π, 2π, for following equation log2sinx-log2cosx+log3tanx+log5tanx=0.

HARD
IMPORTANT

If 'x' is the solution of the equation

log3x+7 4x2+12x+9+log2x+36x2+23x+21=4,  then  1x2=

HARD
IMPORTANT

If lnx+z+lnx-2y+z=2lnx-z, then

HARD
IMPORTANT

x1log3x22logx9=x17, then the value of x is

HARD
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x34log2x2+log2x-54 =2 , then one of the values of x is

HARD
IMPORTANT

If the sum of all solutions of the equation xlog10323log10x2=0 is alogbc where b and c are relatively prime and a, b, c N. Then the value of a+b+c is equal to-