Metallurgical Engineering > GATE 2020 > Sequence and Series
The sum of the first n terms in the sequence 8, 88, 888, 8888,... is __________.
A
(81 / 80)(10n - 1) + (9 / 8)n
B
(81 / 80)(10n - 1) - (9 / 8)n
C
(80 / 81)(10n - 1) + (8 / 9)n
D
(80 / 81)(10n - 1) - (8 / 9)n

Correct : d

Similar Questions

Mr. X speaks _________ Japanese _________ Chinese.
#2 MCQ
A sum of money is to be distributed among P, Q, R, and S in the proportion 5 : 2 : 4 : 3, respectively. If R gets ₹ 1000 more than S, what is the share of Q (...
#3 MCQ
A trapezium has vertices marked as P, Q, R and S (in that order anticlockwise). The side PQ is parallel to side SR. Further, it is given that, PQ = 11 cm, QR...
#4 MCQ

Related Topics

No tags found

Unique Visitor Count

Total Unique Visitors

Loading......