Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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(a) Show that the set of strictly positive reals: R(positive) = { a E R | a > 0}, provided with the operations defined below is a vector space:
- Addition: a + b = ab for all a, b E R(positive)
- Multiplication by a scalar: k*a=a^k, for all k E R and a E R (positive)

(b) Why is the set of positive reals { a E R | a ⩾ 0}, endowed with the same operations, is not a vector space?

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