Q.32 If
f
(
x
)
=
cos
2
x
-
sin
2
x
-
1
x
2
+
1
-
1
,
x
≠
0
k
,
x
=
0
is continous at x=0, find k.
f
(
x
)
=
sin
a
+
1
x
+
sin
x
x
,
f
o
r
x
<
0
x
,
f
o
r
x
=
0
x
+
b
x
2
-
x
b
x
3
2
,
f
o
r
x
>
0
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