if x= 1+√2 and xy=1 find the value of x^-2+y^-2
chikku77:
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given
x=1+√2
xy=1
the value of x^-2+y^-2
=1/x^2+1/y^2
=x^2+y^2/x^2+y^2
=1
hope it helps u
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