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Mathematics
Mathematics
Problem
Let
f
:
(
0
,
∞
)
→
[
9
,
∞
)
f: (0, \infty) \to [9, \infty)
f
:
(
0
,
∞
)
→
[
9
,
∞
)
defined as
f
(
x
)
=
x
12
+
4
x
2
+
4
x
f(x) = x^{12} + \frac{4}{x^2} + \frac{4}{x}
f
(
x
)
=
x
12
+
x
2
4
+
x
4
. Check whether
f
f
f
is onto or not.
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