z sin (), if (2, y) # (0, 0) 2. Determine if a function f : R2 → R defined by f (x, y) = %3D 0, if (r, y) = (0,0) %3D is continuous at (0,0).

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Do no 2 for me and please use the definition of metric spaces

1. Show (in terms of e - 5) that a function f : R → R defined by
S(x, y, z) = (2x + 3y + 4z) is uniformly continuous.
æ sin (), if (x, y) # (0, 0)
2. Determine if a function f : R? →Rdefined by f (x, y) =
0,
if (x, y) = (0,0)
is continuous at (0, 0).
3. Show that X = [0,1) with the discrete metric is bounded but not totally bounded.
4. Let f : DCR → R be uniformly continuous and {",} be a Cauchy sequence in D.
Then show that {f(xn)} is also Cauchy.
Transcribed Image Text:1. Show (in terms of e - 5) that a function f : R → R defined by S(x, y, z) = (2x + 3y + 4z) is uniformly continuous. æ sin (), if (x, y) # (0, 0) 2. Determine if a function f : R? →Rdefined by f (x, y) = 0, if (x, y) = (0,0) is continuous at (0, 0). 3. Show that X = [0,1) with the discrete metric is bounded but not totally bounded. 4. Let f : DCR → R be uniformly continuous and {",} be a Cauchy sequence in D. Then show that {f(xn)} is also Cauchy.
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