2. Prove that if a, b e R, then (a) -(a + b) = (-a) +(-b), (c) 1/(-a) = –(1/a), (b) (-a)·(-b) = a · b, (d) -(a/b) = (-a)/b if b # 0.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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2. Prove that if a, b e R, then
(a) -(a + b) = (-a) +(-b),
(c) 1/(-a) = –(1/a),
(b) (-a)·(-b) = a · b,
(d) -(a/b) = (-a)/b if b # 0.
Transcribed Image Text:2. Prove that if a, b e R, then (a) -(a + b) = (-a) +(-b), (c) 1/(-a) = –(1/a), (b) (-a)·(-b) = a · b, (d) -(a/b) = (-a)/b if b # 0.
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