>> a=[1;4;7]l; b=[2;-1;5]; >> c=dot (a,b) C = 33 >> d=cross (a, b) d = 27 6. -9 > x=a;y=Db'3; >> z=dot (x,y) Z= 33 >> w=cross (x, y) W = 27 -9

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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i need the answer quickly
1. Dot multiplication
A= (a, a, a, .a)
B = (b, b, b, .b.)
A•B = a, *b,
2. Directional multiplication
i
Ax B=a, a,
a,
b, b,
a=[1;4;7]; b= [2;-1;5];
>> c=dot (a,b)
C =
33
>> d3cross (a,b)
d =
27
6.
-9
> x=a'y=b';
>> z=dot (x, y)
Z=
33
>> w=cross (x, y)
W =
27
-9
Transcribed Image Text:1. Dot multiplication A= (a, a, a, .a) B = (b, b, b, .b.) A•B = a, *b, 2. Directional multiplication i Ax B=a, a, a, b, b, a=[1;4;7]; b= [2;-1;5]; >> c=dot (a,b) C = 33 >> d3cross (a,b) d = 27 6. -9 > x=a'y=b'; >> z=dot (x, y) Z= 33 >> w=cross (x, y) W = 27 -9
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