If you mean -1 3 7 11 15 then the nth term is 4n-5 and so the next term will be 19
It is: nth term = 5-4n and so the next term will be -19
If you mean: 15 11 7 3 then the nth term is 19-4n
Un = (-1)n*(2n - 1)
Without further restrictions it can be any of an infinite number of formulae.For example, U{n} = (11n⁴ - 110x³ + 385x² - 518x + 176)/8 which gives the next term as 42.However, if it is an ARITHMETIC SEQUENCE (as I suspect your teacher wants), then the nth term is found:Common difference: (-3) - (-7) = 4→ 0th term is -7 - 4 = -11→ nth term U{n} = 4n - 11
If you mean -1 3 7 11 15 then the nth term is 4n-5 and so the next term will be 19
It is: nth term = 5-4n and so the next term will be -19
The nth term is: 3n-7 and so the next number will be 11
The nth term of the sequence is 2n + 1.
The nth term is: 3n-7 and so the next number will be 11
2n+5
The nth term in this sequence is 4n + 3.
2n + 1
If you mean: 15 11 7 3 then the nth term is 19-4n
tn = 15 - 4n (n = 1,2,3, ... )
The nth term is: 2n+7 and so the next number will be 19
Un = (-1)n*(2n - 1)