NEW YORK (AP) ― Alibaba’s financial results in its first quarter as a publicly traded company highlight its strategy of plowing its profit back into investments, particularly in mobile commerce and marketing.The Chinese e-commerce powerhouse said net income fell 39 percent in the July-September period despite a 54 percent surge in revenue on strong user demand.The results released Tuesday show that Alibaba has a similar strategy as U.S. e-commerce retailer Amazon: Invest profit back into the com