Question 1140842
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For your info :


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(a)   a^n   means  {{{a^n}}},  and is used ONLY for this purpose: to show raising in degree "n".


      For example,  2^2 = {{{2^2}}} = 4;   3^2 = {{{3^2}}} = 9.



(b)   If you want to show the n-th term of a progression / (of a sequence), write  a[n]  or  a(n). 


      We, the tutors, will read it as  {{{a[n]}}}.
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