what is the difference between a and {a}

Asked by mehrotradeepa30 | 19th Apr, 2017, 09:54: PM

Expert Answer:

begin mathsize 16px style In space Set space chapter space we space are space denoting space sets space as space capital space letters space and space elements space of space the space set space in space small space letters.
Hence comma space straight a space is space an space element space of space straight a space set. space left curly bracket straight a right curly bracket space means space it space is space straight a space set space which space has space only space one space element.
straight A space set space containing space only space one space element space is space called space singleton space set.
Note colon space
left curly bracket space right curly bracket space bracket space represent space as space straight a space set. end style

Answered by Sneha shidid | 20th Apr, 2017, 08:17: AM