Calculus In Exercises 6 5 - 6 8 , show that f and g are orthogonal in the inner product space C [ a , b ] with the inner product 〈 f , g 〉 = ∫ a b f ( x ) g ( x ) d x . C [ − 1 , 1 ] , f ( x ) = x , g ( x ) = 1 2 ( 5 x 3 − 3 x )
Calculus In Exercises 6 5 - 6 8 , show that f and g are orthogonal in the inner product space C [ a , b ] with the inner product 〈 f , g 〉 = ∫ a b f ( x ) g ( x ) d x . C [ − 1 , 1 ] , f ( x ) = x , g ( x ) = 1 2 ( 5 x 3 − 3 x )
Solution Summary: The author explains that the functions f(x)=x and
(3) Let V be R2, the set of all ordered pairs (x, y) of real numbers. Define an operation of
"addition" by
(u, v)
(x, y) = (u+x+1,v+y+1)
for all (u, v) and (x, y) in V. Define an operation of "scalar multiplication" by
a(r, y) = (ar, ay)
for all a ER and (x, y) = V.
Under the operations
and the set V is not a vector space. The vector space
axioms (see 5.1.1 (1)-(10)) which fail to hold are and
Let V be the set of all pairs (x,y) of real numbers together with the following operations:
(x1,y1)(x2,y2) = (x1 + x2 − 2, y1 + y2)
c(x,y)
=
= (cx - 2c+2, cy – 5 c + 5).
(a) Show that 1 is a scalar multiplication identity, that is:
10(x,y) = (x,y).
(b) Explain why V nonetheless is not a vector space.
Hint: Check for if scalar multiplication distributes over vector addition.
(a) Let V be R², and the set of all ordered pairs (x, y) of real numbers.
Define an addition by (a, b) + (c,d) = (a + c, 1) for all (a, b) and (c,d) in V.
Define a scalar multiplication by k · (a, b) = (ka, b) for all k E R and (a, b) in V.
.
Verify the following axioms:
(i) k(u + v) = ku + kv
(ii) u + (-u) = 0
Chapter 5 Solutions
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