Question

If, S=5–√+55−−√+555−−−√+5555−−−−√, then find EA , correct up to 4 decemal places.

Answer 1

Answer:

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Answer 2

Answer:

5+55+555+5555+⋯+55…5n fives

=59(9+99+999+9999+⋯+99…9n nines)

 

=59(101−1+102−1+103−1+⋯+10n−1)

=59(101+102+103+⋯+10n−n)

=59(10n+1−109−n).

Step-by-step explanation:

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