Question

Va rog repede,dau coroana

Answer 1

Răspuns:

a)

$=[(\frac{9}{25} *\frac{25}{4} )*\frac{2}{3} ]^{3} +\frac{27}{4} =$

$=(\frac{9}{4} *\frac{2}{3} )^{3} +\frac{27}{4} =$

$=(\frac{3}{2} )^{3} +\frac{27}{4} = \frac{27}{8} +\frac{27}{4} =$

$= \frac{27+2*27}{8} =\frac{81}{8}$

b)

$=\frac{18}{7} :[(\frac{3}{5} )^{2} *\frac{25}{9} ]*\frac{7}{3} =$

$=\frac{18}{7} :(\frac{9}{25} *\frac{25}{9} )*\frac{7}{3} =$

$=\frac{18}{7} :1*\frac{7}{3} =\frac{18}{7} *\frac{7}{3} =6$

c)

$=\frac{13}{2} -[(\frac{5+9}{15} *\frac{15}{7} )^{2} -\frac{7}{2} ]=$

$=\frac{13}{2} -(2^{2} -\frac{7}{2} )=$

$=\frac{13}{2} -\frac{8-7}{2} =\frac{13}{2} -\frac{1}{2} =$

$=\frac{12}{2} =6$

Explicație pas cu pas: