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UPSC NDA I 2012 Mathematics Paper
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© examsnet.com
Question : 58
Total: 120
If one of the roots of the equation
x
2
+
a
x
−
b
=
0
is 1 , then what is
(
a
−
b
)
equal to?
−
1
1
2
−
2
Validate
Solution:
(
1
)
2
+
a
(
1
)
−
b
=
0
a
−
b
=
−
1
© examsnet.com
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