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Question
Mathematics
Write the set builder form A = -1, 1
Q. Write the set builder form
A
=
−
1
,
1
3305
205
KCET
KCET 2015
Sets
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A
A = {x : x is a real number}
9%
B
A = (x : x is an integer)
22%
C
A = {x : x is a root of the equation
x
2
= 1}
57%
D
A = {x : x is a root of the equation
x
2
+ 1 = 0}
12%
Solution:
−
1
,
1
are the roots of the equation
x
2
−
1
=
0
Hence, set builder form of
A
can be written as
A
=
{
x
:
x
is a root of the equation
x
2
=
1
}