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Let function f(x) be defined by the equation f (x) = x2 - 1. If b is a positive real number, then f(1/b) =
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Let function f(x) be defined by the equation f (x) = x2 - 1. If b is a...
f (x) = x2 - 1
Substitute x = 1/b: 
Simplify: 
Get common denominator: 
Subtract fractions: 
Factor numerator: 
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Let function f(x) be defined by the equation f (x) = x2 - 1. If b is a positive real number, then f(1/b) =a)b)c)d)Correct answer is option 'B'. Can you explain this answer?
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