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f : A → B, A = {10, 20, 30}, B = {18, 48, 98, 128, 148}, f(x) = 5x – 2 के लिए प्रदेश, सहप्रदेश और विस्तार प्राप्त करो ।

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प्रदेश A = Df = {10, 20, 30}

सहप्रदेश B = {18, 48, 98, 128, 148}

f(x) = 5x – 2 है इसलिए प्रत्येक x ∈ A के लिए f(x) प्राप्त करेंगे ।

x = 10 के लिए f(10) = 5(10) – 2 = 50 – 2 = 48

x = 20 के लिए f(20) = 5(20)- 2 = 100 – 2 = 98

x = 30 के लिए f(30) = 5(30) – 2 = 150 – 2 = 148

∴ विस्तार Rf = {f(10), (20), f(30)} = {48, 98, 148}

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