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Byju's Answer
Standard XII
Mathematics
Continuity in an Interval
If fx =1-1 x,...
Question
If
f
x
=
1
-
1
x
, then write the value of
f
f
1
x
.
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Solution
Given:
f
x
=
1
-
1
x
Now,
f
1
x
=
1
-
1
1
x
=
1
-
x
⇒
f
f
1
x
=
f
1
-
x
Again,
If
f
x
=
1
-
1
x
Thus,
f
1
-
x
=
1
-
1
1
-
x
=
1
-
x
-
1
1
-
x
=
-
x
1
-
x
=
-
x
-
x
-
1
=
x
x
-
1
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