6. The function of f: R → R, g: R → R are defined by; S1 – x, if x > 0 f(x) = {;?, if x < 0 Sx, g(x) = {x- 1, if x > 0 if x < 0 (a) Find a formula for f • g. Show that f o g is bijective and find its inverse. (b) Find a formula for g •f. Show that g of is neither injective nor surjective.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.5: The Kernel And Range Of A Linear Transformation
Problem 30EQ
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6. The function of f: R → R, g: R → R are defined by;
S1 – x,
if x > 0
f(x) = {;?,
if x < 0
Sx,
g(x) = {x- 1,
if x > 0
if x < 0
(a) Find a formula for f • g. Show that f o g is bijective and find its inverse.
(b) Find a formula for g •f. Show that g of is neither injective nor surjective.
Transcribed Image Text:6. The function of f: R → R, g: R → R are defined by; S1 – x, if x > 0 f(x) = {;?, if x < 0 Sx, g(x) = {x- 1, if x > 0 if x < 0 (a) Find a formula for f • g. Show that f o g is bijective and find its inverse. (b) Find a formula for g •f. Show that g of is neither injective nor surjective.
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