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Byju's Answer
Standard XII
Mathematics
Condition of Concurrency of 3 Straight Lines
15. If the li...
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15. If the lines ax+y+1=0, x+by+1=0, x+y+c=0 (a,b and c are distinct and different from 1) are concurrent then the value of a/(a-1) + b/(b-1) + c/(c-1) is a)0. b)1. c)2. d)3.
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Q.
If the lines
a
x
+
y
+
1
=
0
,
x
+
b
y
+
1
=
0
and
x
+
y
+
c
=
0
(
a
,
b
,
c
being distinct and different from
1
)
are concurrent, then the value of
1
1
−
a
+
1
1
−
b
+
1
1
−
c
is:
Q.
If the lines
a
x
+
y
+
1
=
0
,
x
+
b
y
+
1
=
0
&
x
+
y
+
c
=
0
where a, b & c are distinct real numbers different from 1 are concurrent, then the value of
1
1
−
a
+
1
1
−
b
+
1
1
−
c
=
Q.
If the lines
a
x
+
y
+
1
=
0
,
x
+
b
y
+
1
=
0
and
x
+
y
+
c
=
0
(
a
,
b
,
c
are distinct and different from each other) are concurrent, then the value of
a
+
b
+
c
−
a
b
c
is equal to
Q.
If the lines
a
x
+
y
+
1
=
0
,
x
+
b
y
+
1
=
0
,
and
x
+
y
+
c
=
0
(
a
,
b
,
c
being different from 1
)
are concurrent, then
1
1
−
a
+
1
1
−
b
+
1
1
−
c
is
Q.
If the lines
a
x
+
y
+
1
=
0
,
x
+
b
y
+
1
=
0
,
and
x
+
y
+
c
=
0
(
a
,
b
,
c
being different from 1
)
are concurrent, then
1
1
−
a
+
1
1
−
b
+
1
1
−
c
is
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Condition of Concurrency of 3 Straight Lines
Standard XII Mathematics
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