find the 8#term of the following sequence.9,2,10,3,15,8?

Question

 I  need help with some math problem .like find 7#term of the following sequence.60,30,40,20,30

Answer 1

9 2 10 3 15 8

 

There are 2 patterns here. 

 

If x1 is the first #, x₂ = x₁ -7 and x₃ = x₂ • 5  Use the pattern of x₂ for the even terms and the pattern of x₃ for the odd terms.

x₁ = 9

x₂ = 2

x₃ = 10

x₄ = 3

x₅ = 15

x₆ = 8

x₇  = 24

x₈ = 17

 

Then for the 2nd sequence

60,30,40,20,30

If x₁ is the first #, x₂ = x₁ / 2 and x₃ = x₂ + 10

Use the pattern of x₂ for the even terms and the pattern of x₃ for the odd terms.

x₁ = 60
x₂ = 30
x₃ = 40
x₄ = 20
x₅ = 30
x₆ = 15
x₇ = 25