1) z = √xy+5
D(y): xy+5 >= 0
xy >= -5
a.
2)lim(x->3) x²-9/x-3 = lim(x->3) (x-3)(x+3)/x-3 = lim(x->3) x+3 = 6
1) z = √xy+5
D(y): xy+5 >= 0
xy >= -5
a.
2)lim(x->3) x²-9/x-3 = lim(x->3) (x-3)(x+3)/x-3 = lim(x->3) x+3 = 6