Ответ:

[tex]B)\; 2[/tex]

Объяснение:

[tex](a_n)\; a_{17}=23;\; a_{24}=37\\\\a_{17}=a_1+16d\\a_{24}=a_1+23d\\\\\left \{ {{a_1+16d=23\; *(-1)} \atop {a_1+23d=37}} \right.\\\\\left \{ {{-a_1-16d=-23\; *(-1)} \atop {a_1+23d=37}} \right +\\\\7d=14\\d=14:7\\d=2[/tex]