The function [img=112x28]1803e256ccb5ef7.png[/img]is a [img=11x14]1803e256d59cc41.png[/img]-periodic function.
举一反三
- The function [img=114x27]1803e256894224d.png[/img] is a periodic function.
- The function [img=164x43]1803e256fccc749.png[/img] is a （ ）. A: bounded function B: periodic function C: even function D: odd function
- If [img=34x25]1803e254fa72e37.png[/img] is an even function and [img=33x25]1803e25502f5f78.png[/img] is an odd function，then ( ). A: All [img=191x25]1803e2550bd75da.png[/img] are even functions; B: All [img=191x25]1803e25513d5400.png[/img] are odd functions; C: [img=124x25]1803e2551c3ff9f.png[/img]are odd functions and [img=56x25]1803e25523e8c1c.png[/img]is an even function; D: [img=124x25]1803e2552c8c3c6.png[/img] are even functions and [img=56x25]1803e25534c2a44.png[/img] is an odd function.
- As [img=71x19]1803e23556504c2.png[/img], the function [img=104x25]1803e2356097b36.png[/img] is（ ）. A: an infinity B: an infinitesimal C: an unbounded function D: a bounded function
- If X and Y are any two independent continuous random variables whose probability density is [img=41x25]1803dc1d154ea64.png[/img] and [img=38x26]1803dc1d1dd7772.png[/img],and whose distribution function is [img=47x25]1803dc1d26f6f50.png[/img] and [img=42x25]1803dc1d300d282.png[/img],then [img=47x25]1803dc1d26f6f50.png[/img] + [img=42x25]1803dc1d300d282.png[/img] must be the distribution function of a random variable.