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v(r)= k(a-r)r^2 where k is a constant

evaluate v at a.

This is what I got when I solved but it is not correct.

v(a)=k(a-a)a^2
v(a)=ka^2

2 answers

  1. v(a)=k(a-a)a^2 correct
    v(a)=k(0)a^2
    v(a)= 0 , zero times anything else is zero

  2. oh i see

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