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Question

State true or false:
If ax=b,by=c and cz=a, then xyz=1.

A
True
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B
False
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Solution

The correct option is A True
ax=baxy=by i.e. axy=c
Now, axyz=cz i.e. axyz=axyz=1
Alternative method :
a=cz=(by)z=byz(ax)yz=axyz
i.e. a=axyzxyz=1

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