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CBSE Class 11-science Answered

plz answer the questions
Asked by Anil | 02 Jul, 2017, 06:35: PM
answered-by-expert Expert Answer
begin mathsize 16px style open parentheses straight a plus square root of straight a squared minus 1 end root close parentheses to the power of straight x squared minus 2 straight x end exponent plus open parentheses straight a minus square root of straight a squared minus 1 end root close parentheses to the power of straight x squared minus 2 straight x end exponent equals 2 straight a Let comma space straight x squared minus 2 straight x equals straight m open parentheses straight a plus square root of straight a squared minus 1 end root close parentheses to the power of straight m plus open parentheses straight a minus square root of straight a squared minus 1 end root close parentheses to the power of straight m equals 2 straight a RHS space will space be space 2 straight a space only space when space two space terms space on space LHS space side will space add space up space to space 2 straight a. Hence comma space straight m equals 1 rightwards double arrow straight x squared minus 2 straight x equals 1 rightwards double arrow straight x squared minus 2 straight x minus 1 equals 0 Using space formula space method space you space can space find space the space value space of space straight x Which space will space be space straight x equals 1 plus-or-minus square root of 2 Similarly space you space can space do space the space forst space sum space also. end stylePlease post the proper question whether to prove or to solve these questions?
Answered by Sneha shidid | 03 Jul, 2017, 01:51: PM

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CBSE 11-science - Maths
For a real number r, the quadratics x² + (r - 1) x + 6 and x² + (2r + 1) x + 22 have a common real root. The sum of the possible values of r can be expressed as a/ b where a, b are relatively prime positive integers. Compute 10a + b
Asked by Bhaveshkr211 | 30 Jul, 2023, 05:21: PM
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CBSE 11-science - Maths
Pls solve
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Asked by sdmbotch1123 | 18 Jan, 2023, 11:01: PM
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CBSE 11-science - Maths
complete solution set of the equation |x^2-3|+|2-x|=|x^2-x-1|
Asked by rajshekhara348 | 20 Jun, 2022, 11:23: PM
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CBSE 11-science - Maths
let the equations be x^2+x+2=0 and ax^2+bx+1=0 have atleast one common root then a+b equals to
Asked by sandeepkumarbhadauria41 | 15 Sep, 2021, 02:52: PM
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CBSE 11-science - Maths
Please solve all of these questions with proper explanation
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Asked by Suchismitasingha18 | 07 Aug, 2021, 04:44: PM
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CBSE 11-science - Maths
questions 6
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Asked by sohailsidmd002 | 11 Oct, 2020, 02:35: PM
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CBSE 11-science - Maths
find the value of p and q if the equation px²+5x+2=0 and 3x²+10x+q=0 have both roots in common.
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Asked by ssroul.tcbls | 02 Jul, 2020, 07:15: PM
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CBSE 11-science - Maths
   the equation x minus 2 to the power 2 + x - 2 - 2 = 0 has how many roots
Asked by avinashjha3012 | 22 Jun, 2020, 05:41: PM
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CBSE 11-science - Maths
The quadratic equation, who's roots are reciprocal of the roots of the equation- ax^2+bx+c,is?
Asked by drhimasingh | 26 May, 2020, 11:31: PM
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CBSE 11-science - Maths
write the quadratic equation, the arithmetic mean, Geometric mean of whose roots are A and G respectively
Asked by amanamit818 | 06 Oct, 2019, 11:03: AM
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