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Byju's Answer
Standard XI
Mathematics
Sign of Quadratic Expression
If graph of y...
Question
If graph of
y
=
a
x
2
−
b
x
+
c
is following, then sign of
a
,
b
,
c
are
A
a
<
0
,
b
<
0
,
c
<
0
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B
a
<
0
,
b
>
0
,
c
<
0
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C
a
<
0
,
b
<
0
,
c
>
0
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D
a
>
0
,
b
<
0
,
c
<
0
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Solution
The correct option is
A
a
<
0
,
b
<
0
,
c
<
0
f
(
0
)
<
0
⇒
c
<
0
,
a
<
0
−
(
−
b
)
2
a
>
0
⇒
b
a
>
0
⇒
b
<
0
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0
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