x + 1/x = 2 হলে x = ?

A 1

B 25.4

C 3

D 4

Solution

Correct Answer: Option A

দেওয়া আছে,
x + 1/x = 2 
⇒ (x² + 1)/x = 2 
⇒ x² + 1 = 2x
⇒ x² - 2x + 1 = 0
⇒ (x - 1)² = 0
⇒ x - 1 = 0
∴ x = 1

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