數學 高中 約3年以前

51題，解答九分之一那邊，為何是cot3x的三次方而不是一次方，為何是九分之一不是三分之一？

Finding an Indefinite Integral In Exercises 49–58, find the indefinite integral. Use a computer algebra system to confirm your result. 49. cot 2x dx 50. tan Soor foset X X sec4 4 4 dx 51. csc4 3x dx 52. cores X X cot? csc4 – dx 2 2

數學 高中 5年以上以前

How?

of primary school children showed that between 55% and 65% owned a mputer, between 709 and 80% owned a mobile phone and fewerthan 5% ofthese iems. ge ofthe children owned both a laptop computer and a mobile phone? 415% and 30%