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CBSE Class 9 Answered

Please answer the questions in the picture Attached below
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Asked by Girishdhawan | 03 Jun, 2018, 05:36: PM
answered-by-expert Expert Answer
begin mathsize 16px style ab space plus space bc space plus space ca space equals space 0 minus ab space equals space ac space plus space bc space..... left parenthesis 1 right parenthesis minus bc space equals space ac space plus space ab space..... left parenthesis 2 right parenthesis minus ac space equals space bc space plus space ab space..... left parenthesis 3 right parenthesis We space have space to space find space the space value space of space fraction numerator 1 over denominator straight a squared space minus space bc end fraction plus fraction numerator 1 over denominator straight b squared space minus space ca end fraction plus fraction numerator 1 over denominator straight c squared space minus space ab end fraction from space left parenthesis 1 right parenthesis comma space left parenthesis 2 right parenthesis space and space left parenthesis 3 right parenthesis comma space we space get equals fraction numerator 1 over denominator straight a squared space plus space ac space plus space ab end fraction plus fraction numerator 1 over denominator straight b squared space plus space bc space plus space ab end fraction plus fraction numerator 1 over denominator straight c squared space plus space ac space plus space bc end fraction equals fraction numerator 1 over denominator straight a left parenthesis straight a space plus space straight c space plus space straight a right parenthesis end fraction plus fraction numerator 1 over denominator straight b left parenthesis straight b space plus space straight c space plus space straight a right parenthesis end fraction plus fraction numerator 1 over denominator straight c left parenthesis straight c space plus space straight a space plus space straight b right parenthesis end fraction Taking space straight L. straight C. straight M comma space we space get equals fraction numerator bc space plus space ac space plus space ab space over denominator abc left parenthesis straight a space plus space straight b space plus space straight c right parenthesis end fraction we space have space ab space plus space bc space plus space ca space equals space 0 equals fraction numerator bc space plus space ac space plus space ab space over denominator abc left parenthesis straight a space plus space straight b space plus space straight c right parenthesis end fraction equals space 0 rightwards double arrow fraction numerator 1 over denominator straight a squared space minus space bc end fraction plus fraction numerator 1 over denominator straight b squared space minus space ca end fraction plus fraction numerator 1 over denominator straight c squared space minus space ab end fraction space equals space 0 end style
Answered by Yasmeen Khan | 04 Jun, 2018, 01:08: PM

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CBSE 9 - Maths
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