Question

Ajutor va rog la B si D

Answer 1

Răspuns:

b. $\frac{2}{5}$

d. $\frac{7}{6}$

Explicație pas cu pas:

b.

$\frac{2*2+1}{2} *\sqrt{(0,12)^{2} } +(-1)+\sqrt{(0,4)^{2}}+\frac{16-1}{90} *\sqrt{(0,6)^{2}}=\\\frac{5}{2} *0,12-1+0,4+\frac{15}{90} *0,6=\\\frac{5}{2} *\frac{12}{100}-1+0,4+\frac{1}{6} *\frac{6}{10} =\\\frac{6}{25}-0,6+\frac{1}{10} =\\\frac{6}{25}-\frac{6}{10} +\frac{1}{10} =\\\frac{6}{25}-\frac{5}{10} =\\\frac{6*10 - 5*4}{100} =\\\frac{60 - 20}{100} =\\\frac{40}{100} =\\\frac{2}{5}$

d.

$\sqrt{(\frac{5}{2} )^{2}-2*\frac{5}{2}*\frac{4}{3}+(\frac{4}{3} )^{2}}=\\ \sqrt{\frac{25}{4} -\frac{20}{3}+\frac{16}{9}}=\\ \sqrt{\frac{25*9 - 20*12 + 16*4}{36}}=\\\sqrt{\frac{225 - 240 + 64}{36}}=\\\sqrt{\frac{49}{36}}=\\\sqrt{(\frac{7}{6})^{2} }=\\\frac{7}{6}$

Mult noroc!