The algebraic form of an arithmetic sequence is 5n+4.
a) What is its first term?
b) What is the difference between its 10th and 20th terms?
c) Find the sum of first 20 terms of the sequence.
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Answer:
Sequence = 5n + 4
( i ). For first term,
n = 1,
5n + 4 = 5 ( 1 ) + 4
a_{1} = 9
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