What is the unit digit in the expansion of (57242)^9 x 7 x 5 x 3 x 1 ?

Описание к видео What is the unit digit in the expansion of (57242)^9 x 7 x 5 x 3 x 1 ?

What is the unit digit in the expansion of (57242)^9 x 7 x 5 x 3 x 1?

(a) 2
(b) 4
(c) 6
(d) 8

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