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Question Number 8352 by tawakalitu last updated on 09/Oct/16
make t the subject of the formular.  s = ut + (1/2)gt^2  + 3t^3
$$\mathrm{make}\:\mathrm{t}\:\mathrm{the}\:\mathrm{subject}\:\mathrm{of}\:\mathrm{the}\:\mathrm{formular}. \\ $$$$\mathrm{s}\:=\:\mathrm{ut}\:+\:\frac{\mathrm{1}}{\mathrm{2}}\mathrm{gt}^{\mathrm{2}} \:+\:\mathrm{3t}^{\mathrm{3}} \\ $$
Answered by fernandodantas1996 last updated on 13/Oct/16
s = t(u + (1/2)gt+3t^2 ) ⇔ t = (s/(u + (1/2)gt + 3t^2 ))  t = (s/((2u+gt+6t^2 )/2)) = ((2s)/(2u + gt + 6t^2 )) = (thinking...)
$$\mathrm{s}\:=\:\mathrm{t}\left(\mathrm{u}\:+\:\frac{\mathrm{1}}{\mathrm{2}}\mathrm{gt}+\mathrm{3t}^{\mathrm{2}} \right)\:\Leftrightarrow\:\mathrm{t}\:=\:\frac{\mathrm{s}}{\mathrm{u}\:+\:\frac{\mathrm{1}}{\mathrm{2}}\mathrm{gt}\:+\:\mathrm{3t}^{\mathrm{2}} } \\ $$$$\mathrm{t}\:=\:\frac{\mathrm{s}}{\frac{\mathrm{2u}+\mathrm{gt}+\mathrm{6t}^{\mathrm{2}} }{\mathrm{2}}}\:=\:\frac{\mathrm{2s}}{\mathrm{2u}\:+\:\mathrm{gt}\:+\:\mathrm{6t}^{\mathrm{2}} }\:=\:\left(\mathrm{thinking}…\right) \\ $$

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