Question

What is the next number in the pattern: 1, -2, 5, 2, 9, 6, 13, …?

Answer 1

answers:

-6

20

22

10

Answer 2

see the pattern : -3, +7...

Answer 3

1-3 = -2
-2+7 = 5
5-3 = 2
2+7 = 9
9-3 = 6
6 +7 = 13
13-? = ??

Answer 4

it would be 10

Answer 5

Yes !

Answer 6

good work :)

Answer 7

Thank you could you help me another one?

Answer 8

yea sure

Answer 9

What is the 8th number in the pattern: 20, 12, 4, -4, …?

Answer 10

this is just a arithmetic sequence, a = 20, d = ?

Answer 11

\(t_n = a +(n-1)d\)

\(t_8 = 20 +(8-1)d\)

Answer 12

if u knw d, u can plug in above, and find the 8th term \(t_8\)

Answer 13

d is 12 right?

Answer 14

not exactly..

d = next term - present term
= 12 - 20
= ?

Answer 15

-8

Answer 16

yes plugin above and find \(t_8\)

Answer 17

ok I got -3.375 but that isn't correct

Answer 18

\(t_8 = 20 + (8-1)(-8)\)

\( = 20 + (7)(-8)\)

\( = 20 - 56\)

\( = ?\)

Answer 19

-36! thank you again

Answer 20

np :)