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Mathematics
Mathematics
Problem
For what least integral 'k' is the quadratic trinomial
(
k
−
2
)
x
2
+
8
x
+
(
k
+
4
)
(k-2)x^2 + 8x + (k+4)
(
k
−
2
)
x
2
+
8
x
+
(
k
+
4
)
is positive for all real values of
x
x
x
? (a)
k
=
4
k = 4
k
=
4
(b)
k
=
5
k = 5
k
=
5
(c)
k
=
3
k = 3
k
=
3
(d)
k
=
6
k = 6
k
=
6
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