Let co be constant. Verify that U = F(x — cot) and U = G(x + cot) are solutions of Utt = co^2Uxx for any twice-differentiable functions F and G. If F(x) = 1/(1 + x2), sketch time profiles of the wave U(x, t) =(F(x-t)+F(x+t)).

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d