Question

(-1)× even no. of times=

Answer 1

It will be always a negative even no.
For ex---
-1×2=-2
-1×24=-24
-1×46=-46
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Answer 2

-1 x -1 = 1

${( - 1)}^{2x} = 1$
-1 multiplied even no. of times gives 1
since (-) x (-) = (+)