(a) For two years after a partner dissociates without resulting in a dissolution and winding up of the partnership business, the partnership, including a surviving partnership under article nine of this chapter, is bound by an act of the dissociated partner which would have bound the partnership under section one, article three of this chapter before dissociation only if at the time of entering into the transaction the other party:
(1) Reasonably believed that the dissociated partner was then a partner;