How many hours has Xing Xijian been promoted to undergraduate mathematics?
Xing Xijian was promoted to undergraduate mathematics for 36 hours. According to the public information of relevant inquiries, Xingge's series of public welfare courses in advanced mathematics mainly include twelve chapters, such as limit and continuity, derivative and differential, indefinite integral, infinite series, vector algebra and spatial analytic geometry, covering all real test sites, so that students can learn advanced mathematics happily, worry-free and safely.