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Byju's Answer
Standard IX
Mathematics
Product Law
State true or...
Question
State true or false:
If
a
x
=
b
,
b
y
=
c
and
c
z
=
a
, then
x
y
z
=
1
.
A
True
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B
False
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Solution
The correct option is
A
True
a
x
=
b
⇒
a
x
y
=
b
y
i.e.
a
x
y
=
c
Now,
a
x
y
z
=
c
z
i.e.
a
x
y
z
=
a
⇒
x
y
z
=
1
Alternative method :
a
=
c
z
=
(
b
y
)
z
=
b
y
z
(
a
x
)
y
z
=
a
x
y
z
i.e.
a
=
a
x
y
z
⇒
x
y
z
=
1
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0
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