## Answers

eiker kt U (x, t) = sih (lxlekt x = l cos (lx) e-kt x = -1² sih (lx) e R- - k²t ut = sth(lx) e (-8²) 200 Lų + U = 0 - k²t. è sih (lx) (- 1²) = 0 - 5th (x) e Rt - K²) + ett sin (la) [2²-e} = 0 I l al k = et one possibility + Answer l ² k - = sih lx = 0 - lx = nT ; NEZ l = ni & second possibility It not a real number - kt values of k. t o for any and e

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