English
Hindi
4-2.Quadratic Equations and Inequations
medium

સમીકરણ ${x^{{{\log }_x}{{(1 - x)}^2}}} = 9\,\,$ નો ઉકેલગણ.......છે.

A

$\{- 2, 4\}$

B

$\{4\}$

C

$\{0, - 2, 4\}$

D

એકપણ નહી.

Solution

${x^{{{\log }_x}(1 – x)}}^2 = 9\,\,$ આપેલ છે.

$ \Rightarrow \,\,{\log _x}(9) = {\log _x}{(1 – x)^2}$

$({a^x} = N\,\,\, \Rightarrow {\log _a}N = x)$

$ \Rightarrow \,9 = {(1 – x)^2}$

$ \Rightarrow 1 + {x^2} – 2x – 9 = 0$

$ \Rightarrow {x^2} – 2x – 8 = 0$   $ \Rightarrow \,\,(x + 2)(x – 4) = 0$

$ \Rightarrow \,x =  – 2\,,4$

Standard 11
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.