Site navigation

The product of the roots of the equation \(\log_{2} 2^{(\log_{2}x)^{2}} -5 \log_{2}x+6=0\) is

Question and options

The product of the roots of the equation log⁡22(log⁡2x)2−5log⁡2x+6=0\log_{2} 2^{(\log_{2}x)^{2}} -5 \log_{2}x+6=0 is
  1. 32
  2. 12
  3. 16
  4. 6

Answer and explanation

Correct answer: A - 32

The product of the roots is 32. Setting t=log⁡2xt=\log_2 x reduces the equation to t2−5t+6=(t−2)(t−3)=0t^2-5t+6=(t-2)(t-3)=0, so x=4x=4 or x=8x=8. Multiplying the logarithm values 22 and 33 before converting back to xx gives 6.

Practice for these exams

  • IPMAT Indore

Related question papers

Related exam syllabi

More solved explanations in Number series & simplification