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Write an expression to describe the sequence below. Use n to represent the position of a term in the sequence, where n = 1 for the first term.

–72, –71, –70, –69, ..

2 Answers

4 votes

Answer:

-73 +n

the first term is -73+1

the secound is -73+2

and so on

User Salim Ibrohimi
by
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4 votes

Answer:


a_(n)= n - 73

Explanation:

there is a common difference between consecutive terms , that is

- 71 - (- 72) = - 70 - (- 71) = - 69 - (- 70) = 1

this indicates the sequence is arithmetic with nth term


a_(n) = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

here a₁ = - 72 and d = 1 , then


a_(n) = - 72 + 1(n - 1) = - 72 + n - 1 = n - 73

User Fastidious
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