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AP EAMCET2014MathematicsFunctions

If R is the set of all real numbers and f: R- 2 R is defined by f(x)= 2+x 2-x for x R- 2

Options

  1. AR- -2
  2. BR
  3. CR- 1
  4. DR- -1

Correct answer

D. R- -1

Step-by-step solution

Let y=f(x)= 2+x 2-x aligned & 2 y-x y=2+x & x(1+y)=2 y-2 & x= 2(y-1) 1+y , y -1 aligned Domain of y is R- -1 . Hence, range of f(x) is R- -1 .

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