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## Homework Statement

check for linear dependecy[/B]

f(x) = cosx and g(x) = xcosx

2 functions from R to R

## Homework Equations

## The Attempt at a Solution

Why this is wrong:

if i take the scalar a1 = 3, a2 = 1

i can do that since 3 is real, and a1 is in R.

so 3f(3) + -1g(3) = 0

there for we have none trivial comb for the zero vector.