Question

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.​

Answer 1

Answer:

Sequence = 5n + 4

( i ). For first term,

n = 1,

5n + 4 = 5 ( 1 ) + 4

a_{1} = 9