6. i et f : a on a set e e d ? be function defined d in rt with d. (a) define what it means for f to be continnous at c, and write down a couple of other 3 equivalent conditions (b) let f() -0if is rational, and /(n)- rif r is irrational. show that fis discontimous how that f is discontinuous at every nonzero number but that f is continuous at 0. give all details.

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

i honestly dont know

step-by-step explanation:

consider the parallelogram shown in the attached image.

in the parallelogram hijk, the length of hk is given as,

from the properties of parallelogram we know that the opposite sides of a parallelogram are parallel to each other and are equal in measure.

therefore, the length of the side ij must be equal to the length of the side hk and that is .

hence, the expression for the length of ij confirms that hijk is a parallelogram.