Byju's Answer
Standard VII
Mathematics
Properties of Multiplication of Integers
-1 × a
Question
(-1)×a
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Solution
-1 x a = - a
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Similar questions
Q.
If A = {-1, 1}, Find
A
×
A
×
A
Q.
a
b
−
a
−
b
+
1
=
?
(
a
)
(
a
−
1
)
(
b
−
1
)
(
b
)
(
1
−
a
)
(
1
−
b
)
(
c
)
(
a
−
1
)
(
1
−
b
)
(
d
)
(
1
−
a
)
(
b
−
1
)
Q.
Prove that
(
a
+
1
b
+
1
a
+
1
b
+
1
a
+
.
.
.
.
)
(
1
b
+
1
a
+
1
b
+
1
a
+
.
.
.
.
)
=
a
b
.
Q.
Factorize:
3
a
2
−
1
−
2
a
Q.
Assertion :If the matrices A, B, (A + B) are nonsingular, then
[
A
(
A
+
B
)
−
1
B
]
−
1
=
B
−
1
+
A
−
1
Reason:
[
A
(
A
+
B
)
−
1
B
]
−
1
=
[
A
(
A
−
1
+
B
−
1
)
B
]
−
1
=
[
(
I
+
A
B
−
1
)
B
]
−
1
=
[
(
B
+
A
B
−
1
B
)
]
−
1
=
[
(
B
+
A
I
)
]
−
1
=
[
(
B
+
1
)
]
−
1
=
B
−
1
+
A
−
1
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