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Show that {fn}, where fn : [0, 1] → R is the map fn(x) = x
n, is not uniformly convergent.
Show that {fn}, where fn : [0, 1] → R is the map fn(x) = x
n, is not uniformly convergent.
Let {vn} be a sequence in R2
, say vn = (xn, yn). Give R2
the || ||∞
norm. Show that limn→∞ vn → v if and only if limn→∞ xn = x and
limn→∞ yn = y where v = (x, y).

On R^n show that || . ||∞ ≤ || . ||2

.


Under what condition the equality holds in |a+b|≤|a|+|b|,a,b∈R ?
Suppose that {xn} is a convergent sequence and {yn} is such that for any ε>0, there exists M such that |xn−yn|< ϵ for all n≥M. Show that {yn} is a convergent sequence.
Applying Bolzano-Weierstrass theorem show that the set
S={1+1/ n ∨ n∈N}∪{−1−1/ n ∨ n∈N}
must have a limit.
Is every subsequence of a divergent sequence is divergent ? Justify.
Prove that
a) Any Open ball is an open set
b) Any closed ball is closed set.
If {xn} does not converge to L, show that there exist  > 0 and a subsequence {xnk
}
of {xn} such that |xnk − L| ≥  for each k ∈ N.
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