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মনে করো সব অখণ্ড সংখ্যার সেট ZZ এবং f: Z...

মনে করো সব অখণ্ড সংখ্যার সেট `ZZ` এবং `f: ZZ to ZZ` চিত্রণ `f(x) = x^2` দ্বারা সংজ্ঞাত তাহলে নীচের কোনটি `f^-1(-4)` এর সমান হবে

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