1. (a) Define f: R² → R by sin(r-y) f(x, y):= if y #x, f(t, t) = 1 Vt ER. Prove that f is continuous at all points of R?. (b) Define g: R2 → R by sin(ry) r² + y2" (x, y) E R? \ {(0,0)}, g(x, y) g(0,0) = 0. %3D Prove that g is separately continuous, but not 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
Problem 1RQ
icon
Related questions
Question

Hi kindly help

1. (a) Define f: R² → R by
sin(r-y)
f(x, y):=
if y #x,
f(t, t) = 1 Vt ER.
Prove that f is continuous at all points of R?.
(b) Define
g:
R2 → R by
sin(ry)
r² + y2"
(x, y) E R? \ {(0,0)},
g(x, y)
g(0,0) = 0.
%3D
Prove that g is separately continuous, but not continuous, at (0,0).
Transcribed Image Text:1. (a) Define f: R² → R by sin(r-y) f(x, y):= if y #x, f(t, t) = 1 Vt ER. Prove that f is continuous at all points of R?. (b) Define g: R2 → R by sin(ry) r² + y2" (x, y) E R? \ {(0,0)}, g(x, y) g(0,0) = 0. %3D Prove that g is separately continuous, but not continuous, at (0,0).
Expert Solution
steps

Step by step

Solved in 5 steps with 5 images

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, advanced-math and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Advanced Engineering Mathematics
Advanced Engineering Mathematics
Advanced Math
ISBN:
9780470458365
Author:
Erwin Kreyszig
Publisher:
Wiley, John & Sons, Incorporated
Numerical Methods for Engineers
Numerical Methods for Engineers
Advanced Math
ISBN:
9780073397924
Author:
Steven C. Chapra Dr., Raymond P. Canale
Publisher:
McGraw-Hill Education
Introductory Mathematics for Engineering Applicat…
Introductory Mathematics for Engineering Applicat…
Advanced Math
ISBN:
9781118141809
Author:
Nathan Klingbeil
Publisher:
WILEY
Mathematics For Machine Technology
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,
Basic Technical Mathematics
Basic Technical Mathematics
Advanced Math
ISBN:
9780134437705
Author:
Washington
Publisher:
PEARSON
Topology
Topology
Advanced Math
ISBN:
9780134689517
Author:
Munkres, James R.
Publisher:
Pearson,