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The number of distinct real roots of the equation \(\bigg(\frac{x+1}{x}\bigg)^2-3\bigg(\frac{x+1}{x}\bigg)+2=0\) equals
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Updated On: Jan 15, 2026
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The Correct Option is D

Solution and Explanation

The equation to be solved is: \(\left(\frac{x+1}{x}\right)^2 - 3\left(\frac{x+1}{x}\right) + 2 = 0\). .

Step 1: Substitute \( y = \frac{x+1}{x} \) into the equation. This results in the quadratic equation:

\(y^2 - 3y + 2 = 0\).

Step 2: Solve the quadratic equation \(y^2 - 3y + 2 = 0\) using the quadratic formula \( y = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \), with \( a = 1, b = -3, c = 2 \).

\(y = \frac{-(-3) \pm \sqrt{(-3)^2 - 4 \cdot 1 \cdot 2}}{2 \cdot 1}\)

\(y = \frac{3 \pm \sqrt{9 - 8}}{2}\)

\(y = \frac{3 \pm 1}{2}\)

The solutions for \(y\) are \(y = 2\) and \(y = 1\).

Step 3: Substitute back \( y = \frac{x+1}{x} \) to find \( x \):

Case 1: For \( y = 2\):

\( \frac{x+1}{x} = 2\)

\( x+1 = 2x\)

\( x = 1\).

Case 2: For \( y = 1\):

\( \frac{x+1}{x} = 1\)

\( x+1 = x\)

This simplifies to \( 1=0 \), which is an impossible statement. Therefore, there is no solution for \( x \) in this case.

The only distinct real root is \(x = 1\).

Consequently, the number of distinct real roots is 1.

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