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Home / Doubts and Solutions/ICSE/Class 11 Science/Mathematics

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Asked by lovemaan5500 3rd June 2018, 12:58 PM
Answered by Expert
Answer:
begin mathsize 16px style Three space successive space terms space of space expansion space left parenthesis 1 plus straight x right parenthesis to the power of straight n will space be space straight C presuperscript straight n subscript straight r comma straight C presuperscript straight n subscript straight r plus 1 space end subscript comma straight C presuperscript straight n subscript straight r plus 2 end subscript straight C presuperscript straight n subscript straight r equals 28 straight C presuperscript straight n subscript straight r plus 1 space end subscript equals 56 straight C presuperscript straight n subscript straight r plus 2 space end subscript equals 70 fraction numerator straight C presuperscript straight n subscript straight r plus 1 space end subscript over denominator straight C presuperscript straight n subscript straight r space end subscript end fraction equals 56 over 28 fraction numerator straight n minus straight r over denominator straight r plus 1 end fraction equals 2 straight n minus straight r equals 2 straight r plus 2 straight n minus 3 straight r equals 2.... left parenthesis 1 right parenthesis fraction numerator straight C presuperscript straight n subscript straight r plus 2 space end subscript over denominator straight C presuperscript straight n subscript straight r plus 1 space end subscript end fraction equals begin inline style 5 over 4 end style fraction numerator straight n minus straight r minus 1 over denominator straight r plus 2 end fraction equals begin inline style 5 over 4 end style 4 straight n equals 9 straight r plus 14... left parenthesis 2 right parenthesis from space left parenthesis 1 right parenthesis space and space left parenthesis 2 right parenthesis straight n equals 8 end style
Answered by Expert 4th June 2018, 12:25 PM
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