(=) Assume I + a = I + b. .. a El + a :: a El + b : a = i + b for some i EI .. i = a – b .. a – bE I (E) Assume a - bEI Assume x E I + a .: x = i + a for some i EI . x = i + a + (-b+ b) : x = (i + a – b) + b .. x E I + b .. I + a CI + b Assume x E I + b .: x = i + b for some i E I :: x = i +b + (-a + b) .x = (i + b – a) + a .. x EI + a .. I +b CI+a .: I + a = 1 + b

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
Justify each claim of the proof
(=) Assume I + a = 1 + b.
.. a El + a
:: a El + b
. a = i +b for some i E l
.. i = a – b
.. a – bE I
(E) Assume a – b € I
Assume x E I + a
.: x = i + a for some i EI
.. x = i + a + (-b+b)
: x = (i + a – b) + b
.. x E I + b
.. I + a CI + b
Assume x E I + b
.: x = i + b for some i E I
: x = i + b + (-a + b)
.x = (i + b – a) + a
.. x EI + a
.. I +b CI+a
.: I + a = 1 + b
Transcribed Image Text:(=) Assume I + a = 1 + b. .. a El + a :: a El + b . a = i +b for some i E l .. i = a – b .. a – bE I (E) Assume a – b € I Assume x E I + a .: x = i + a for some i EI .. x = i + a + (-b+b) : x = (i + a – b) + b .. x E I + b .. I + a CI + b Assume x E I + b .: x = i + b for some i E I : x = i + b + (-a + b) .x = (i + b – a) + a .. x EI + a .. I +b CI+a .: I + a = 1 + b
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