It seems like there is a misunderstanding in the sequence mentioned. The terms given are -2, -3, and -4, with a notation "[1\2]" that is unclear.
If the sequence indicates that it is an arithmetic sequence beginning with -2 and following a pattern, we first need to identify the common difference. Based on the first two terms:
- Second term: -3
- First term: -2
The common difference (d) can be calculated as:
\[ d = -3 - (-2) = -1 \]
Identifying the terms:
- First term (a₁) = -2
- Second term (a₂) = -3
- Third term (a₃) = -4 (given)
- Fourth term (a₄) = -4 - 1 = -5
- Fifth term (a₅) = -5 - 1 = -6
- Sixth term (a₆) = -6 - 1 = -7
- Seventh term (a₇) = -7 - 1 = -8
Hence, the fifth term is -6 and the seventh term is -8.