if we use the boundary condition at r=0, a = 0, for the following equation a = C1r + C2/r + qr is it safe to say that C2=0? and thus: a = C1r + qr
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Originally Posted by calypso if we use the boundary condition at r=0, a = 0, for the following equation a = C1r + C2/r + qr is it safe to say that C2=0? and thus: a = C1r + qr Yes, otherwise $\displaystyle a$ becomes unbounded.
what do you mean by unbounded sorry? If you sub in a = 0 and r = 0, you are left with 0 = C2/0 however this make no sence because dividing by 0 should give infinity
Originally Posted by calypso what do you mean by unbounded sorry? If you sub in a = 0 and r = 0, you are left with 0 = C2/0 however this make no sence because dividing by 0 should give infinity If you fix $\displaystyle c_2$ then as $\displaystyle r \to 0$, then $\displaystyle a$ grows without bound ($\displaystyle a \to \infty$).
Ok great, thanks for reply
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