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Answer:
E. - 4n+9
Explanation:
Formula of nth term:
An: a +(n-1)d
Given:
a=5
d= a2-a1 = 1-5 = -4
Therefore, substituting the given values:-
An: 5 + (n-1) - 4
An: 5 - 4n + 4
An: 9 - 4n or
An: -4n + 9
Hence proved.
Hope this helps :)
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