$R_1$ means "is married with"
$R_2$ means "is the mother of"
$R_3$ means "is child of"
Describe the following relations on the set of all humans colloquially:
(i) $R_1 \circ R_2$
(ii) $R_2 \circ R_1$
(iii) $R_2 \circ R_3$
(iv) $R_3 \circ R_2$
(v) $R_2 \circ R_1 \circ R_3$
No sure what is asked. I try like these:
(i) is married with mother of.. I think this mean father?
(ii) is mother of married with.. = Husband?
(iii) is mother of is child of.. = Grandmother?
(iv) is child of is mother of.. = Grandson?
(v) is mother of is married with is child of.. = no idea xd
There is maybe trick how understand this correct? I don't know I understand it good or not.
HINT
Try using $x$, $y$, and $z$ (and a $w$ for the last one) Also, draw a family tree.
For example, for i): $x$ is married to $y$, who is the mother of $z$ ... then $x$ is the husband of $z$. So, yes, you got that one correct!
ii) $x$ would be the mother of $y$ who is married to $z$ .. making $x$ the mother-in-law of $z$
OK .. can you try this for the others?