1.

Which of the following are correct (where [.] denotes greatest integer funcation and {.} fractional part funcation)

Answer»

`1 le [x] le 5 rArr x in[1x,6)`
`ubrace(SGN(sgn(sgn(sgn"........"sgn(x)))))_("n TIMES composition")=sign(x)`
`{x}+{-x}={{:(0 if x in I), (1 if x !in I):}`
`antilog_(3) (log_(6)(antilogsqrt(5)(log_(5)1296))) = 9`

Solution :N//A


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