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CBSE Class 10 Answered

DEAR
 
PLS SOLVE THE ATTACHED 3 QUES. OF MATHS
 
Asked by yashpalguglani | 18 Jun, 2016, 01:49: PM
answered-by-expert Expert Answer
begin mathsize 12px style Kindly space ask space only space 1 space question space at space straight a space time. 1. space Since space 2 space is space the space zero space of space the space polynomial comma space straight f left parenthesis 2 right parenthesis space equals space 0 rightwards double arrow straight a left parenthesis 2 right parenthesis squared minus 3 left parenthesis straight a minus 1 right parenthesis left parenthesis 2 right parenthesis minus 1 equals 0 rightwards double arrow 4 straight a minus 6 straight a plus 6 minus 1 equals 0 rightwards double arrow 2 straight a equals 5 rightwards double arrow straight a equals 5 over 2 2. space Since space the space zeroes space are space reciprocals comma space rightwards double arrow fraction numerator 6 straight a over denominator straight a squared plus 9 end fraction equals 1 rightwards double arrow 6 straight a equals straight a squared plus 9 rightwards double arrow straight a squared minus 6 straight a plus 9 equals 0 rightwards double arrow left parenthesis straight a minus 3 right parenthesis left parenthesis straight a minus 3 right parenthesis equals 0 rightwards double arrow straight a equals 3 3. space Since space the space zeroes space are space reciprocals comma space rightwards double arrow straight k over 2 equals 1 rightwards double arrow straight k equals 2 end style
Answered by Rebecca Fernandes | 19 Jun, 2016, 07:28: AM

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