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Find the sum of the sequence 7, 77, 777...

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

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To find the sum of the sequence 7, 77, 777, 7777, ..., up to n terms, we can follow these steps: ### Step 1: Identify the pattern in the sequence The sequence can be expressed as: - 1st term: 7 - 2nd term: 77 = 7 × 11 - 3rd term: 777 = 7 × 111 - 4th term: 7777 = 7 × 1111 ...
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