If x = 7+4√3 and x y =1 find 1/x2+1/y2 [ sol: 194].
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Step-by-step explanation:
x= 7+4√3
x^2 = 97
xy=1
y= 1/ x
y = 1/ 7+4√3
y= 1/ 97
1/ x^2+ 1/y^2= 1/ 97 + 1/97
2/ 97
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