Choose the best answer for the following sentence:He is not in town; he ____________ on a special mission. A. is sending B. will be sent C. has sent D. has been sent
Choose the best answer for the following sentence:The university ____________ by private funds as well as by tuition income and grants. A. is supported B. supports C. is supporting D. has supported
Choose the best answer for the following sentence:Having finished ______________________ the reading report, I began to listen to music. A. to write B. to have written C. writing D. written
Choose the best answer for the following sentence: The burglar _____________________. A. has been disappeared with the cash B. disappeared the cash C. disappeared with the cash D. was disappeared with the cash
Choose the best answer for the following sentence:This is about the _____________ that people with epilepsy and their families successfully manage each and every day. A. challenges B. objections C. supports D. threats
Đạo hàm của hàm số f(x) = (x2 + 1)4 tại điểm x = -1 là:A. -32. B. 30. C. -64. D. 12.
Cho f(x) = cosx.cos3x. Đạo hàm của hàm f(x) tại điếm x = bằng:A. 2. B. . C. 1. D. -1.
Với f(x)=-3x+42x-1 thì f'(1) bằngA. 5. B. 15. C. -5. D. -15.
Hàm số y=sinπ6-3x có đạo hàm là:A. y'=cosπ6-3x. B. y'=3cosπ6-3x. C. y'=-3sinπ6-3x. D. y'=-3cosπ6-3x.
Trong các tập hợp sau đây, tập hợp chứa giá trị x sao cho f(x) không xác định làA. [2, 3]. B. [0, 1]. C. (1, 2). D. (-3, -2).
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