Subject
Bank Exam
Topic
Probashi Kallyan Bank Ltd (Senior Officer) - 09.10.2021
If x²+9/x² =31,what is the value of (x-3/x)?
If x²+9/x² =31,what is the value of (x-3/x)?
ক)
36খ)
25গ)
9ঘ)
5Explanation
দেওয়া আছে , x²+9/x² =31 বা,(x)² +(3/x)² =31 বা,(x-3/x)² +2×x × 3/x =31 বা, (x-+6=31 বা,(x-3/x)²=25 ∴ (x-3/x )=√25 =5Related questions
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