Tag Archives: NUST math questions

Functions & Limits

QUESTION:

If f(x,y) = 3x + 2y and g(x,y) = x2 – y2 for all real numbers of x and y, then f(g(1,2)3) = ?

OPTIONS:

  • -8
  • -3
  • 9
  • 6

CORRECT ANSWER:

-3

EXPLANATION:

F(g(1,2)3) = 3(1-4) + 2(3) = -3

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