the 2nd last line the subscript for a^2(n-1) is n-2 but in your last line it is n-1,
Clearly just a typo.the 2nd last line the subscript for a^2(n-1) is n-2 but in your last line it is n-1,
your therefore line is incorrect...
I'll edit it if it's bothering you that much.the 2nd last line the subscript for a^2(n-1) is n-2 but in your last line it is n-1,
your therefore line is incorrect...
just sayingI'll edit it if it's bothering you that much.