show that y-1 is a factor of y^20 - 1 and y^21 - 1. pls answer fast I'm in a great need for help...
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Answered by
1
put y=1 in both equation..if u get 0 ans than it's zero of given equation
Answered by
2
Hi ,
Let p( y ) = y^20 - 1
And f( y ) = y^21 - 1 ,
If p ( 1 ) = 0 , f ( 1 ) = 0 then ( y - 1 ) is a
factor of p ( 1 ) and f ( 1 ) ,
1 ) p ( 1 ) = ( 1 ) ^20 - 1
= 1 - 1 = 0
2 ) f ( 1 ) = ( 1 )^21 - 1
= 1 - 1
= 0
Therefore ,
y - 1 is a factor of p ( y ) and f( y ).
I hope this helps you.
:)
Let p( y ) = y^20 - 1
And f( y ) = y^21 - 1 ,
If p ( 1 ) = 0 , f ( 1 ) = 0 then ( y - 1 ) is a
factor of p ( 1 ) and f ( 1 ) ,
1 ) p ( 1 ) = ( 1 ) ^20 - 1
= 1 - 1 = 0
2 ) f ( 1 ) = ( 1 )^21 - 1
= 1 - 1
= 0
Therefore ,
y - 1 is a factor of p ( y ) and f( y ).
I hope this helps you.
:)
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