Evaluate 81^-3/4 ?
1 Answer
May 10, 2018
Explanation:
#"using the "color(blue)"laws of exponents"#
#•color(white)(x)a^-mhArr1/a^m#
#•color(white)(x)a^(m/n)hArr(root(n)a)^m#
#rArr81^(-3/4)=1/81^(3/4)=1/27#
#[81^(3/4)=(root(4)81)^3=(3)^3=27]#
