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7+77+7777+............+(7777777...7)=(7)...

7+77+7777+............+(7777777...7)=(7)/(81)(10^(-21)-9n-10)" ior alin "=N*14M-A-2018-191

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prove that 7 + 77 + 777 +...... + 777........._(n-digits) 7 = 7/81 (10^(n+1) - 9n - 10) for all n in N

prove that 7 + 77 + 777 +...... + 777........._(n-digits) 7 = 7/81 (10^(n+1) - 9n - 10) for all n in N

Prove the following by the principle of mathematical induction: 7+77+777+.....+777++\ ddotn-d igi t s7=7/(81)(10^(n+1)-9n-10) for all n in N Bdot

Prove the following by the principle of mathematical induction: 7+77+777++777++ddot n-digits7=(7)/(81)(10^(n+1)-9n-10) for all n in NB.

Prove the following by the principle of mathematical induction: 7+77+777++777++\ ddotn-d igi t s7=7/(81)(10^(n+1)-9n-10) for all n in N

Prove the following by the principle of mathematical induction: 7+77+777++777++\ ddotn-d igi t s7=7/(81)(10^(n+1)-9n-10) for all n in N

Evaluate 7+77+777+...... upto n

Evaluate 7+ 77+777+...... upto n

Sum to n term .7+.77+.777.......

1/3,4/9,7/(27),(10)/(81),?,(16)/(729)