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Using principle of mathematical induction prove …

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Using principle of mathematical induction prove that 7+77+777+.............to n terms = 7/81(10*n+1-9n-10) , for all n belongs to N

    • Posted by Viral Baliyan 7 years, 10 months ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Rahul Bansal 7 years, 10 months ago

    7(1+11+111.....) 7/9(9+99+999....) 7/9[(10-1)+(10^2-1)+(10^3-1)] 7/9[(10+10^2+10^3....)-(1+1+1......) 7/9[10(10^n-1)/9 -n) Hence proved

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