Respuesta :

bosm93

Answer:

Step by step solution

Step-by-step explanation:

[tex]a_1 = -1\\a_4 = 14\\a_4 = a_1 + 3d\\14 = -1 + 3d\\15 = 3d\\d = 5\\a_1 = -1\\a_2 = 4\\a_3 = 9\\a_4 = 14[/tex]