NCERT Class XI Mathematics - Relations and Functions - Solutions
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Question : 22
Total: 36
A function f is defined by f (x) = 2x – 5. Write down the values of
(i) f (0) (ii) f (7) (iii) f (–3)
(i) f (0) (ii) f (7) (iii) f (–3)
Solution:
We are given f (x) = 2x – 5
(i) f (0) = 2(0) – 5 = 0 – 5 = – 5
(ii) f (7) = 2(7) – 5 = 14 – 5 = 9
(iii) f (–3) = 2(–3) – 5 = – 6 – 5 = – 11.
(i) f (0) = 2(0) – 5 = 0 – 5 = – 5
(ii) f (7) = 2(7) – 5 = 14 – 5 = 9
(iii) f (–3) = 2(–3) – 5 = – 6 – 5 = – 11.
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