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\f\fWhich of the following is true? 252+ 5 - 3 a. lim =-1 S-+ 1 s- 1 x - 2 b. lim do not exist x-+2 x - 2 2t c. lim = t-+-34t - 2 x - 5 d. lim = -4 x-+5 Vx - 1 - 2 e. none of the above