If , then…

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

If x4f(x)−1−sin⁡(2πx)=∣f(x)∣−2f(x)x^4f(x)-\sqrt{1-\sin(2\pi x)}=|f(x)|-2f(x), then f(−2)f(-2) equals (a) 117\frac1{17} (b) 111\frac1{11} (c) 12\frac12 (d) 00

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