Mathematics

EXERCISE 1.3

  1. Function f and gf are given as f (x) = x+1/2 and gf (x) = 3x + 2 respectively. Find function g.

  2. Given f (x) = 5 − 3x and g(x) = 4x . Find function fg.

  3. Given gf (x) = x − 6 and g(x) = 4x − 3. Find
    (i) function f
    (ii) function fg

  4. Given the function w(x) = 3 − 2x and
    v x = x2 −1 , find the functions
    (a) wv
    (b) vw

(a) state the value of k
(b) find

(i) wv(x)
(ii) vw(x)

1.4 INVERSE FUNCTIONS :


Example 1 :

 

1.4.1 Determining the inverse function :

Example 1:

 

CBSE Mathematics Class XI ( By Mr. Ayaz Khan )
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