Keisha's Solution David's Solution
sine+ cos2 = 1
tan? + 1 sece
sin
1
+ 1 =
cose
e
cos?o=1--23
COS
COS A+
225
289
8
17
+ 1 =
cos²a cose
15
COS =+
17
+ cos2 = 1
COS +
1-
64
289
15
cos et
17
Whose procedure is correct?

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

365

step-by-step explanation:

the answer is 0052

0 0 5 2

5 0 2 6 3 5

− 0

2 6

− 0

2 6 3

− 2 5 0

1 3 5

− 1 0 0

3 5