Form the sequence k2, for k=1,…,5; then select the third member of this sequence.
Maple Solution - Interactive
Context Panel: Sequence≻k≻1,5
See Figure A-3.2(a)
Figure A-3.2(a) Sequence dialog
Context Panel: Select Element≻3
k2→sequence w.r.t. k1,4,9,16,25→select entry 39
Alternatively, name the sequence and use selection-brackets:
Context Panel: Assign to a Name≻q
k2→sequence w.r.t. k1,4,9,16,25→assign to a nameq
q3 = 9
To unassign the name q interactively, use the Variables palette. (See Table A-1.2.)
Maple Solution - Coded
Use the seq command to create the sequence (see Section 10.2), and assign to the name q.
Selection-brackets extract the third item in the sequence.
Unassign the name q with the unassign command.
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