Vector space question need help
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Vector space question need help

[From: ] [author: ] [Date: 13-08-22] [Hit: ]
y,y)=(0,my,and the last,(0,y,......
Im stuck on this question does anyone know how to do it i have no idea :(

Determine if the set of all triples of real numbers of the form (0,y,z) where y=z with standard operations on R3 is a vector space.

Thankyou if you can help

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first the set is not empty (0,5,5) is an element of the set

if you multiply any element of the set by some number
m(0,y,y)=(0,my,my) so the same type of triple
it belongs to set

and the last, sum of any two elements of the set belongs to set
(0,y,y)+(0,t,t)=(0,y+t,y+t)

belongs to set.
so this set is vector space with standard operations.
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