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Byju's Answer
Standard X
Mathematics
Quadratic Equations
Assertion A T...
Question
Assertion (A)
The equation
2
x
2
-
4
x
+
3
=
0
has no real roots.
Reason (R)
The equation
a
x
2
+
b
x
+
c
=
0
,
(
a
≠
0
)
has no real roots, if
(
b
2
-
4
a
c
)
<
0
.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.
Open in App
Solution
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
Reason
(
R
)
is true
.
F
rom the equation 2
x
2
−
4
x
+
3
=
0
,
we have:
D
=
(
−
4
)
2
−
4
×
2
×
3
=
16
−
24
=
−
8
<
0
Therefore
,
the given equation has no real roots
.
Thus, Assertion
(
A
)
is true and Reason
(
R
)
is a correct explanation of Assertion
(
A
)
.
Suggest Corrections
0
Similar questions
Q.
Assertion (A)
If
p
x
2
-
2
x
+
2
=
0
has real roots, then
p
≤
1
2
.
Reason (R)
The equation
(
a
2
+
b
)
x
2
+
2
(
a
c
+
b
d
)
x
+
(
c
2
+
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2
)
=
0
has no real root, if ad ≠ bc.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.
Q.
Assertion (A)
If −5 is a root of
2
x
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+
2
p
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-
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=
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and
p
(
x
2
+
x
)
+
k
=
0
has equal roots, then
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=
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.
Reason (R)
The equation
a
x
2
+
b
x
+
c
=
0
,
a
≠
0
has equal roots, if
(
b
2
-
4
a
c
)
=
0
.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.
Q.
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The system of equations
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y
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=
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and
6
x
-
4
y
+
3
=
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is inconsistent.
Reason (R)
The system of equations
a
1
x
+
b
1
y
+
c
1
=
0
and
a
2
x
+
b
2
y
+
c
2
=
0
has a unique solution when
a
1
b
2
≠
b
1
b
2
.
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.
Q.
Assertion (A)
The polynomial p(x) = x
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Reason (R)
A polynomial of nth degree has at most n zeros.
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(b) Both assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.
Q.
Assertion (A)
The system of equations
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=
0
and
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-
y
-
2
=
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has a unique solutions.
Reason (R)
The system of equations
a
1
x
+
b
1
y
+
c
1
=
0
and
a
2
x
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b
2
y
+
c
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has a unique solution when
a
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a
2
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(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.
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