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JEE Main
Exam
JEE Main
Subject
Mathematics
Chapter
Basics of Mathematics

JEE Main · Mathematics · Basics of Mathematics

Number of integral solutions of inequality ((1)/(10)) ^ _ (x - 3)...

Number of integral solutions of inequality (110)log⁡(x−3)(x2−4x+3)≥1{\left(\dfrac{1}{10}\right)}^{\log_{\left(x - 3\right)} \left(x^{2} - 4x + 3\right)}\ge 1 are&

Options

  1. A0
  2. B1
  3. C2
  4. D3

Correct answer

A. 0

Step-by-step solution

(110)log⁡(x−3)(x2−4x+3)≥(110)0⇒log⁡(x−3)(x2−4x+3)≤0{\left(\dfrac{1}{10}\right)}^{\log_{\left(x - 3\right)} \left(x^{2} - 4x + 3\right)} \ge {\left(\dfrac{1}{10}\right)}^{0} ⇒ \log_{\left(x - 3\right)} \left(x^{2} - 4x + 3\right) \le 0 ~ ~ ~ & (base is less than 1)

Case - I : \left(x - 3\right) > 1andand0 < x^{2} - 4x + 3 \le 1<br/><br/><br /><br />⇒ x > 4andand( x - 1 ) ( x - 3 ) > 0andandx^{2} - 4x + 2 \le 0<br/><br/><br /><br />⇒ x > 4andandx^{2} - 4x + 2 \le 0 ⇒ x > 4andand2 - \sqrt{2} \le x \le 2 + \sqrt{2} ∴notpossible<br/><br/>not possible<br /><br />∴ NoSolution<br/><br/><strong>Case−II:</strong>~ No Solution<br /><br /><strong>Case - II :</strong>0 < \left(x - 3\right) < 1andandx^{2} - 4x + 3 \ge 1<br/><br/><br /><br />⇒ 3 < x < 4andandx \le 2 - \sqrt{2}x \ge 2 + \sqrt{2}<br/><br/><br /><br />⇒ 2 + \sqrt{2} \le x < 4 ⇒thereisnointegralvalueofx.there is no integral value of x.
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