Mechanical Engineering > Gate 2020 Set-1 > Verbal
The sum of the first n terms in the sequence 8, 88, 888, 8888, … is ________.
A
80 / 81
(10n-1) -
8 / 9
n
B
81 / 80
(10n-1) -
9 / 8
n
C
81 / 80
(10n-1) +
9 / 8
n
D
80 / 81
(10n-1) +
8 / 9
n

Correct : a

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