cheap answer, recall that minus * minus = plus. So if we just use any even exponent for (-1), that'll give us a positive.
(-1)² = (-1)(-1) = +1
(-1)⁴ = (-1)(-1)(-1)(-1) = 1
(-1)¹⁰ = (-1)(-1)(-1)(-1)(-1)(-1)(-1)(-1)(-1)(-1) = 1.
7.3m questions
9.7m answers