Q2 of 118 Page 3

Mark the correct alternative in the following:

If f : Q → Q is defined as f(x) = x2, then f-1 (9)s is equal to



Replace f(x) by y,




Replace x by and y by x.



So,



Option C is correct.

More from this chapter

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18

Let f and g be two real functions given by

f = {(0, 1), (2, 0), (3, -4), (4, 2), (5, 1)} and g = {(1, 0), (2, 2), (3, -1), (4, 4), (5, 3)}.


Find the domain of fg.


 1

Mark the correct alternative in the following:

Let A = {1, 2, 3}, B = {2, 3, 4}, then which of the following is a function from A to B?


 3

Mark the correct alternative in the following:

Which one of the following is not a function?


 4

Mark the correct alternative in the following:

If f(x) = cos (log x), then has the value