ফাংশন (Function) MCQ 5+

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• একটি ফাংশন f : R →R, f(x) =2x+1 দ্বারা সংজ্ঞায়িত হলে f-1(2) এর মান কত?
  ক

  12

  খ

  5

  গ

  1
• g (x) = ax2 +24 For the function g defined above or is a constant and g(4) =8 . What is the value of g(-4) ?
  ক

  8

  খ

  -1

  গ

  -8
• f(x)=x2-5x+6 এবং f (x) =0 হলে x = কত?
  ক

  2,3

  খ

  -5,1

  গ

  -2,3

  ঘ

  1,-5
• If f is a function defined from R is given by f (x) = 3x -5, then f-1 (x) is given by :
  ক

  1/(3x-5)

  খ

  (x +5)/3

  গ

  does not exist since it is not a bisection

  ঘ

  (3x + 5)/3
• If f (x) =x2+1x-1-1, then which of the following is correct ?
  ক

  f(0)=∞

  খ

  f(1)=-1

  গ

  f(1)=0

  ঘ

  f(-1)=-1