Show that any nonempty set A c (X, d) is open if and only if it is a
union of open balls.
56.25ร0.14รท12
โ๐ฅ โ 15 = โ8
l - f = alt make l the subject
x = y+at make t the subject
5/2-/1
10=3.1+ใ10ใ^(x/3)
If
๐ฅ
:
๐ฆ
=
1
2
x:y=1:2 and
๐ง
4
3
y:z=4:3, find
x:z.
l - f = alt
3^9x = 3^7x+8 [1]
5/12-1/10
