Huh? What is that supposed to mean?
Please support that opinion with some examples. Thank you.
You try to calculate this expression with CASIO ClassPad, TI-NSPRE CAS and TI 89T/V200, you fail in any way:
'ABS(\GS(K=1,+\oo,((1+i)/2)^K))' ('\GS' is the summation symbol and 'i' is the imaginary unit)
Using the HP 50g we can do it with these steps:
'\GS(K=1,N,((1+i)/2)^K)' EVAL SIMPLIFY
'(-(i*EXP((2*N*LN(2)+i*\pi*N)/4))+i*EXP(N*LN(2)))/EXP(N*LN(2))'
'N=\oo'
'lim'
result: 'i'
and finally we get 1 with ABS
P.S. The HP 50g can calculate symbolically '99999^999' and numerically a 100x100 linear system!
Edited by supergems, 12 February 2010 - 04:15 PM.