1.

If A_l=(x-a_i)/(|x-a_i|)30, i=1,2,..., n and if a_1 lt a_2 lt a_3lt ..... lta_n. Then, lim_(xtoa_m) (A_1A_2.....A_n), 1 le mle n

Answer»

is EQUAL OT `(-1)^m`
is equal to `(-1)^m+1`
is equal to `(-1)^m-1`
does not EXIST.

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