Question

Consider the arithmetic sequence 81, 77, 73, ..

a) What is the common difference?

b) What is the remainder when each positive term of this sequence is divided by 4?

c) Which is the smallest positive number of this sequence?

d) Write its algebraic form.

e) How many positive numbers are there in this sequence?

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Answer 1

Answer:

ansA common dofference is -4

ansc smallest positibe number is4

Answer 2

Answer:

$a) 77 - 81 = - 4 d)xn = dn + f - d = - 4 \times n + 81 - - 4 = - 4n + 77$