The product of 5 and n is written as .
Two less than this product is
What is the domain of f?
2 answers:
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You can use the generic representation of a term of an arithmetic sequence:
Filling in the values a₁=-8, d=5, you have
Then the value of n for the last term can be found as
67 = -13 + 5n
80 = 5n
16 = n
and the sum can be written as
Filling in the values a₁=-8, d=5, you have
Then the value of n for the last term can be found as
67 = -13 + 5n
80 = 5n
16 = n
and the sum can be written as