April 2020 1 56 Report
Lingkaran x2 + y2 + 2x – 4y – 11 = 0 dirotasikan pada pusat O(0,0) dengan sudut rotasi – 90o. Persamaan bayangan lingkaran tersebut adalah …

A. x2 + y2 – 4x – 2y – 11 = 0

B. x2 + y2 – 4x – 2y + 11 = 0

C. x2 + y2 – 4x + 2y – 11 = 0

D. x2 + y2 + 4x – 2y + 11 = 0

E. x2 + y2 + 4x + 2y + 11 = 0


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