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CBSE Class 11-science Answered

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Asked by sudhanshubhushanroy | 08 Nov, 2017, 10:13: AM
answered-by-expert Expert Answer
straight T subscript straight r plus 1 end subscript equals to the power of straight n straight C subscript r open parentheses 2 to the power of straight x close parentheses to the power of straight n minus straight r end exponent open parentheses 1 over 4 to the power of straight x close parentheses to the power of straight r straight T subscript 3 equals to the power of straight n straight C subscript 2 open parentheses 2 to the power of straight x close parentheses to the power of straight n minus 2 end exponent open parentheses 1 over 4 to the power of straight x close parentheses squared straight T subscript 2 equals to the power of straight n straight C subscript 1 open parentheses 2 to the power of straight x close parentheses to the power of straight n minus 1 end exponent open parentheses 1 over 4 to the power of straight x close parentheses straight T subscript 3 over straight T subscript 2 equals 7 fraction numerator blank to the power of straight n straight C subscript 2 open parentheses 2 to the power of straight x close parentheses to the power of straight n minus 2 end exponent open parentheses 1 over 4 to the power of straight x close parentheses squared over denominator blank to the power of straight n straight C subscript 1 open parentheses 2 to the power of straight x close parentheses to the power of straight n minus 1 end exponent open parentheses 1 over 4 to the power of straight x close parentheses end fraction equals 7 fraction numerator left parenthesis straight n minus 1 right parenthesis over denominator 2 cross times 8 to the power of straight x end fraction equals 7........... left parenthesis 1 right parenthesis sum space of space coff space of space straight T subscript 3 space & space straight T subscript 2 space is space 36 to the power of straight n straight C subscript 2 space plus space to the power of straight n straight C subscript 1 space end subscript equals space 36 fraction numerator straight n left parenthesis straight n minus 1 right parenthesis over denominator 2 end fraction plus straight n space equals 36 straight n squared minus straight n minus 72 equals 0 straight n equals 9 space or space straight n equals negative 8 straight n not equal to negative 8 space can apostrophe straight t space be space negative. put space straight n equals 9 space in space left parenthesis 1 right parenthesis space and space use space log.
Answered by Arun | 07 Dec, 2017, 05:28: PM

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