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TS EAMCET 2016 Code A Solved Paper
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© examsnet.com
Question : 13
Total: 160
If
α
,
β
,
γ
are the roots of
x
3
−
5
x
+
4
=
0
then
(
α
3
+
β
3
+
γ
3
)
2
=
12
13
169
144
Validate
Solution:
x
3
−
5
x
+
4
=
0
α
+
β
+
γ
s
1
=
0
,
s
2
=
−
5
,
s
3
=
−
4
α
3
+
β
3
+
γ
3
=
3
α
β
γ
(
α
3
+
β
3
+
γ
3
)
2
=
9
(
α
β
γ
)
2
=
9
(
−
4
)
2
=
16
(
9
)
=
144
© examsnet.com
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