1 - (1/x) = 3 হলে (x+ 1)/x2 এর মান কত?

A 5

B 10

C 9

D 7

Solution

Correct Answer: Option A

দেওয়া আছে,

1 - 1/x = 3

⇒ - 1/x = 3 - 1

⇒ - 1/x = 2

⇒ 1/x = -2

⇒ x = -1/2

∴ প্রদত্ত রাশি = (x+ 1)/x2

= {(-1/2)2 + 1 }/(-1/2)2

= {(1/4) + 1}/ (1/4)

= {(1 + 4)/4}/ 1/4

= (5/4) / (1/4)

= (5/4) Χ (4/1)
= 5

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