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Byju's Answer
Standard XII
Mathematics
Relation between Roots and Coefficients for Quadratic
The sum of ro...
Question
The sum of roots of the equation
t
a
n
−
1
1
1
+
2
x
+
t
a
n
−
1
1
1
+
4
x
=
t
a
n
−
1
2
x
2
is
A
3
/
2
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B
7
/
3
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C
9
/
4
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D
n
o
n
e
o
f
t
h
e
s
e
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Solution
The correct option is
B
7
/
3
t
a
n
−
1
(
2
+
6
x
(
1
+
6
x
+
8
x
2
)
−
1
)
=
t
a
n
−
1
(
2
x
2
)
⇒
2
+
6
x
6
x
+
8
x
2
=
2
x
2
⇒
2
x
2
+
6
x
3
=
12
x
+
16
x
2
⇒
6
x
3
−
14
x
2
−
12
x
=
0
⇒
x
(
6
x
2
−
14
x
−
12
)
=
0
Hence sum of roots is
14
6
=
7
3
Suggest Corrections
0
Similar questions
Q.
Solve the following equation
tan
−
1
1
1
+
2
x
+
tan
−
1
1
4
x
+
1
=
tan
−
1
2
x
2
.
Q.
A non zero integral solution of the equation is
t
a
n
−
1
1
2
x
+
1
+
t
a
n
−
1
1
4
x
+
1
=
t
a
n
−
1
2
x
2
is
Q.
Solve the following equations for
x
:
(i)
tan
-
1
1
4
+
2
tan
-
1
1
5
+
tan
-
1
1
6
+
tan
-
1
1
x
=
π
4
(ii)
3
sin
-
1
2
x
1
+
x
2
-
4
cos
-
1
1
-
x
2
1
+
x
2
+
2
tan
-
1
2
x
1
-
x
2
=
π
3
(iii)
tan
-
1
2
x
1
-
x
2
+
cot
-
1
1
-
x
2
2
x
=
2
π
3
,
x
>
0
(iv) 2
tan
-
1
(
sin
x
)
=
tan
-
1
(2
sin
x
),
x
≠
π
2
.
(v)
cos
-
1
x
2
-
1
x
2
+
1
+
1
2
tan
-
1
2
x
1
-
x
2
=
2
π
3
(vi)
tan
-
1
x
-
2
x
-
1
+
tan
-
1
x
+
2
x
+
1
=
π
4
Q.
Solve the following equations for
x
:
(i)
tan
-
1
1
4
+
2
tan
-
1
1
5
+
tan
-
1
1
6
+
tan
-
1
1
x
=
π
4
(ii)
3
sin
-
1
2
x
1
+
x
2
-
4
cos
-
1
1
-
x
2
1
+
x
2
+
2
tan
-
1
2
x
1
-
x
2
=
π
3
(iii)
tan
-
1
2
x
1
-
x
2
+
cot
-
1
1
-
x
2
2
x
=
2
π
3
,
x
>
0
(iv)
(v)
(vi)
tan
-
1
x
-
2
x
-
1
+
tan
-
1
x
+
2
x
+
1
=
π
4
Q.
The value of
tan
−
1
(
1
1
+
1
+
1
2
)
+
tan
−
1
(
1
1
+
2
+
2
2
)
+
tan
−
1
(
1
1
+
3
+
3
2
)
+
.
.
.
.
.
.
.
∞
is
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