InterviewSolution
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InterviewSolution
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1/a+1/b+1/x= |
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Answer» QUESTION:\xa0Solve; 1/a+b+x=1/a+1/b+1/xAnswer:1/(a+b+x)=1/a + 1/b + 1/x1/(a+b+x) -1/x = 1/a + 1/bx-(a+b+x)/x(a+b+x) = a+b/ ab-1(a+b) /x(a+b+x) = a+b/ ab-1(a+b)/(a+b) = x(a+b+x)/ab-1=x(a+b+x) / ab-ab= (a+b)x + x2so, x2\xa0+ (a+b)x +ab = 0now, A = 1, B=(a+b) C= ab..so, D = B2\xa0- 4AC =(a+b)2\xa0- 4ab = (a-b)2so, x = (-B + root D)/2A and (-B-root D)/2A = -a-b+a-b /2*1 and -a-b-a+b /2*1 = -2b/1 and -2a /1so,x = -2b or -2a . Don\'t know |
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