state gov MP Police SI Mock Test 2023 Quantitative Aptitude Algebra Identities

यदि x एक परिमेय संख्या है और [ ( x + 1)3 - ( x -1 )3 ] / [(x+1)2 - ( x - 1)2 ] = 2 है, तब x के अंश और हर का योगफल कितना है?

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