Does the Exponential Function appear in the ENEM? Yes or Definitely? Don't have any doubts, class, functions are always present in the ENEM exams and exponential functions can certainly be present. Do you want to learn how to solve questions about exponential functions? In this Math video lesson, you will learn how to solve questions about exponential functions that have already appeared in the ENEM, in previous exams, in addition to being able to download the PDF material to practice in the last link in the description. This content is studied in the 1st year of high school. Don't forget, this subject is a good choice for the ENEM. Study with me and be successful in Math. ONLINE MATHEMATICS PLATFORM: https://thyagoaraujo.com/ Solved questions from previous ENEM exams 01. (ENEM-2013) In an experiment, a culture of bacteria has its population reduced by half every hour, due to the action of a bactericidal agent. In this experiment, the number of bacteria as a function of time can be modeled by a function of the type a) affine. b) sine. c) cosine. d) increasing logarithmic. e) exponential. 02. (ENEM-2016/2nd Application) Assume that a type of eucalyptus has an expected exponential growth in the first years after its planting, modeled by the function y(t) = at -1, in which y represents the height of the plant in meters, t is considered in years, and a is a constant greater than 1. The graph represents the function y. Also assume that y(0) gives the height of the seedling when planted, and it is desired to cut the eucalyptus trees when the seedlings grow 7.5 m after planting. The time between planting and cutting, in years, is equal to a) 3. b) 4. c) 6. d) log2 7. e) log2 15. 03. (ENEM-2016/2nd Application) The government of a city is concerned about a possible epidemic of an infectious disease caused by bacteria. To decide what measures to take, you must calculate the speed of reproduction of the bacteria. In laboratory experiments with a bacterial culture, initially with 40 thousand units, the formula for the population was obtained: p(t) = 40 • 23t where t is the time, in hours, and p(t) is the population, in thousands of bacteria. In relation to the initial quantity of bacteria, after 20 min, the population will be a) reduced to one third. b) reduced to half. c) reduced to two thirds. d) doubled. e) tripled. 04. (ENEM-2015) The addition of technologies to the industrial production system aims to reduce costs and increase productivity. In the first year of operation, an industry manufactured 8,000 units of a certain product. The following year, it invested in technology by acquiring new machines and increased production by 50%. It is estimated that this percentage increase will be repeated in the following years, ensuring an annual growth of 50%. Consider P to be the annual quantity of products manufactured in year t of operation of the industry. If the estimate is met, what is the expression that determines the number of units produced P as a function of e t, for t ≥ 1? a) P(t) = 0.5 . t -1 + 8 000 b) P(t) = 50 . t -1 + 8 000 c) P(t) = 4 000 . t -1 + 8 000 d) P(t) = 8 000 . (0.5) t-1 e) P(t) = 8 000 . (1,5) t-1 --- Follow us on social media: ► PLATFORM (Website): https://thyagoaraujo.com/cursos/ ► Instagram: / escoladenumeros ► Instagram: / professorthyagoaraujo ► Instagram: / prof.raissacosta ► Instagram: / danieloliveira_qui ► Instagram: / andrefisica ► Twitter: / escoladenumeros CONTACT EMAIL: [email protected] Here on the channel you will find several free video classes in Mathematics, Chemistry, Physics and Biology for elementary and high school. SUBSCRIBE TO THE CHANNEL HERE: https://www.youtube.com/c/EscoladeNum... QUESTION LISTS: https://thyagoaraujo.com/listas-de-qu... CREATED BY MASTER PROFESSOR IN MATHEMATICS THYAGO ARAUJO FERREIRA #Mathematics #PaesUema2022 #ENEM2021