Question

calcule o valor de x+y. Considere: x=81 ¾ e y= 32 2/5

Answer 1

$x=81^{ \frac{3}{4} }= 3^{4.( \frac{3}{4} )}=3^{ \frac{12}{4} }=3^3=27 \\ \\ y=32^{ \frac{2}{5}}=2^{5. \frac{2}{5}}=2^{ \frac{10}{5} }=2^2=4 \\ \\ logo \\ \\ x+y=27-4=\fbox{ 23 }$