7 + 77 + 777 + …. N terms =

Find the sum of the sequence 7, 77, 777, 7777, . . . to n terms.

If ninNN , then by principle of mathematical induction prove that, 7+77+777+ . . . to n terms =(7)/(81)(10^(n+1)-9n-10) .

Find the sum of the sequence 7, 77, 777, 7777, ... to n terms.

Find the sum of the sequence 7, 77, 777, 7777, ... to n terms.

Find the sum of the sequence 7, 77, 777, 7777, ... to n terms.

Find the sum of the sequence 7, 77, 777, 7777, ... to n terms.

Find the sum of the following series : 0. 7+0. 77+0. 777+ ton terms

Find the sum of the following series : 0. 7+0. 77+0. 777+ ton terms

Find the sum of the following series : 0. 7+0. 77+0. 777+ ton terms

Find the sum of the following series : 0. 7+0. 77+0. 777+ ton terms