How do I isolate t

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Kim-Patrick Rosenkilde
评论： Star Strider 2016-12-10
I am trying to isolate t, and know that t is given by the solution of the equation
t^(15+1)+0.05*t-(1*5*0.015)/(0.1*0.015*0.023)==0
I have tried using solve but it says t is undefined. I have used syms t, but I don't udnerstand the result: root(z^16 + z/20 - 50000/23, z, [1:16])

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Star Strider
Star Strider 2016-12-10
Use vpasolve instead, and get the results of your 16-degree polynomial:
syms t
t_root = vpasolve(t^(15+1)+0.05*t-(1*5*0.015)/(0.1*0.015*0.023)==0, t)
t_root =
-1.6165109272342043846839953936581
1.6165034145848299801810661369555
- 1.4934605455143908446798389421908 + 0.61861316869838829053666346062702i
- 1.4934605455143908446798389421908 - 0.61861316869838829053666346062702i
- 1.1430431824670372344567623879183 + 1.1430469387114870144773726933077i
- 1.1430431824670372344567623879183 - 1.1430469387114870144773726933077i
- 0.61860785655790668700836197024349 + 1.4934605455578138888239619166887i
- 0.61860785655790668700836197024349 - 1.4934605455578138888239619166887i
0.0000037563246849305454659369071760138 - 1.6165071710229900331612597936968i
0.0000037563246849305454659369071760138 + 1.6165071710229900331612597936968i
0.61861316880322239896764449684854 - 1.4934552333125004485706764465214i
0.61861316880322239896764449684854 + 1.4934552333125004485706764465214i
1.1430431824670395061627610793625 - 1.1430394260621148816804444402974i
1.1430431824670395061627610793625 + 1.1430394260621148816804444402974i
1.4934552332690751327205564155858 - 0.61860785645307030687138060757141i
1.4934552332690751327205564155858 + 0.61860785645307030687138060757141i
  2 个评论
Kim-Patrick Rosenkilde
Kim-Patrick Rosenkilde 2016-12-10
编辑：Star Strider 2016-12-10
another question; then if
l = (0.023*t_roots)/0.01
which t value do I use ?
Star Strider
Star Strider 2016-12-10
Any of them or all of them.
Your choice.
I have no idea what problem you are solving.

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