"Mathematics 1B" typically refers to the second semester of a first-year university calculus sequence (or an advanced high school course). Topics include integral calculus, techniques of integration, applications of definite integrals, introductory differential equations, and often sequences and series. This is the infamous "weed-out" level—harder than 1A (limits and derivatives) and the point where many STEM aspirants either find their stride or change majors.
"Mathematics 1B" typically refers to the second semester of a first-year university calculus sequence (or an advanced high school course). Topics include integral calculus, techniques of integration, applications of definite integrals, introductory differential equations, and often sequences and series. This is the infamous "weed-out" level—harder than 1A (limits and derivatives) and the point where many STEM aspirants either find their stride or change majors.