Rule: If x+1/x = n then what is the value of x²+1/x² = ?

Rule: If 2x+1/2x = n then what is the value of 4x²+1/4x² = ?

Rule: If 2x+1/3x = n then what is the value of = 4x²+1/9x² = ?

Q. What is Integer ?

Definition: An integer is a whole number which can be positive, negative, or zero, without any fractional or decimal part. Integer বুলিলে সেই পূৰ্ণসংখ্যাক বুজায় যি ধনাত্মক, ঋণাত্মক বা শূন্য হ’ব পাৰে, আৰু ইয়াত কোনো ভগ্নাংশ বা দশমিক অংশ নাথাকে। 

Note: 0 is an integer. Fractions (1/2, 3/4) are not integers . Decimals (2.5, -1.2) are not integers

Trick: Whenever a-1/a = x, (x is integer), the value of aⁿ-1/aⁿ must be divisible .....

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