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DPiD Maths Mock Set 1 Paper 1 · Q12

Paper 1Algebra

Suppose xx and yy are positive reals such that x−y2=1x-y^2=1 and x2+y4=41x^2+y^4=41. Find xx.

A44
B55
C41\sqrt{41}
D66
E−1+172\frac{-1+\sqrt{17}}2
F33
G2020
H99

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