Question

What is the value of n, if n² – 1 = 0 ? Because,
Case 1 :— n² – 1 = 0.
=> n² = 1.
=> n = √1 = 1.
Case 2 :— n² – 1 = 0.
=> n² – 1² = 0.
=> (n+1)(n–1) = 0.
=> n+1 = 0 and n–1 = 0.
=> n = –1 and n = +1.

So, what is the value of n?
Is n = 1, or is n = –1 and n = +1 ?
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Answer 1

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