Answer:
Step-by-step explanation:
arithmetic sequences can be written as
[tex]a_n = a_1 + (n-1)d[/tex]
[tex]29 = a_1 + (1-1)d\\29 = a_1\\9 = 29 + (2-1)d\\9 = 29 + d\\d = -20\\a_n = 29 -20 (n-1)\\a_n = 29 - 20n+20\\a_n = -20n + 49\\\\a_51 = -20(51) + 49 = -951[/tex]
