What is the value of open paren negative 3 fourths close paren to the negative 4 power ?

A negative exponent means take the reciprocal of the base raised to the corresponding positive power. Thus, (−3/4)^−4 = 1 ÷ (−3/4)^4 = 1 ÷ (81/256) = 256/81. The fourth power is positive because the negative base is multiplied by itself an even number of times, so the correct choice is 256 over 81.

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