Question

3X³y²/4 - 5x²y/7 para x=1/2 e y= -1

Answer 1

x=1/2 e y=-1
3×(1/2)^3×(-1)^2 /4 - 5×(1/2)^2 ×(-1) /7

3×(1/8) × 1 /4 + 5×(1/4) /7

3/8 /4 + 5/4 /7

3/32 + 5/28

nesse caso 3/32 =0.09375 e 5/28 = 0.17857

logo 0.09375 + 0.17857 = 0.27232

espero ter ajudado