Question

© The expression for calculating the sum of
first n term of an arithmetic sequence is
$3 {n }^{2} - 2n$

a) Find the first term of the arithmatic sequence.
b) Find the
common difference
c) write the sequence
d) Find it's algebraic expression.
e)
Find the sum
of first 25 terms of this
Sequence​

Answer 1

Answer:

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