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If (R={(x,y):y^2=x,\ x\in{1,4},\ y\in{-2,-1,1,2}}) is considered from (x) to (y), why is (R) not a function?यदि (R={(x,y):y^2=x,\ x\in{1,4},\ y\in{-2,-1,1,2}}) को (x) से (y) की ओर माना जाए, तो (R) फलन क्यों नहीं है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: Because (x=1) has two images (1) and (-1)क्योंकि (x=1) की दो छवियां (1) और (-1) हैं
From (y^2=1), both (y=1) and (y=-1) are obtained. In exams, if one input has two images, it is not a function.(y^2=1) से (y=1) और (y=-1) दोनों मिलते हैं। परीक्षा में एक इनपुट की दो छवियां मिलें तो फलन नहीं होता।
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