Question

HELLPPP!!
what's an explicit definition for the sequence -3, 1, 5, 9 ?!

Answer 1

what do you mean by explicit definition?

Answer 2

A formula that allows direct computation of any term for a sequence a1, a2, a3, . . . , an, . . . .

Answer 3

nth term= a+ (n-1)d
where a= -3
d= 4

Answer 4

for ex
10th term= -3 + (9)4 = 33

Is that what you are looking for?

Answer 5

You want an explicit formula for this sequence is what you mean?

Answer 6

yes @tHe_FiZiCx99

Answer 7

Is the sequence arithmetic or geometric?

Answer 8

geometric I think! I got an = -3 + 4 (n-)

Answer 9

@d3v13 no =/

Answer 10

One way to find out is by using the previous term,

9/5 = 1.8
5/1 = 5
and so on...

They don't have a common ratio, where as if I subtracted 9-5 it gives me 4,

5-1 = 4

1-(-3) = 4

So they have a common ♦(difference)♦ so its arithmetic.

The explicit formula for arithmetic is: an = a1 + d(n – 1)

a1 = -3
d = 4
n = the term you want to find

Answer 11

thank u so much for explaining!! :)))

Answer 12

yw