Could I write(adsbygoogle = window.adsbygoogle || []).push({});

v = 4i + 3j -2k as

v =

[ 4 |

| 3 | * I_3

| -2 ]

were I_3 is the 3x3 identity matrix and the other thing it's multiplied by is a 3x1 matrix of values 4,3,-2

I also had a question about the notation

f(x) = x^2 + 3

can be written as

f: x |-> x^2 + 3

can I write vectors in this matter as well if instead

v = 4x^2 i + 3x j -2x k

as

v: x |-> 4x^2 i + 3x j - 2x k

or something like

v: x |->

[ 4x |

| 3 | * x * I_3

| -2 ]

I'm sort of confused by

f: x |-> and just want to make sure I'm applying it correctly and am wondering if I can use the identity matrix instead of the unit vectors?

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# Homework Help: A Question on Notation about Linear Algebra

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