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Official 2021 Paper 1 · Q20

Paper 1Powers & logarithmsAlgebra

Find the length of the curve with equation

2log⁡10(x−y)=log⁡10(2−2x)+log⁡10(y+5)2\log_{10}(x-y)=\log_{10}(2-2x)+\log_{10}(y+5)
A55
B1010
C1515
D3π3\pi
E9π9\pi
F12π12\pi

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