Question

Find the 18th and nth terms of the A.P.16, 11, 6, 1,-4,...
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Answer 1

Answer:

a=16, d= 11-16=-5

T18= a+17d

=16+17 into - 5

=16 -85

=--69

Tn = a+(n-1)d

=16 + (n-1)-5

=16 - 5n+5

21-5n

Answer 2

Answer:

The given question is solved in the uploaded photo.