Question

помогите найти при а

Answer 1

17.23.  = $frac{2a}{b}= 9.8;$

17.24.  =$frac{x8a}{b}= frac{8*(-49)}{-80} =4.9;$1

17.25.  = $frac{ a^{2} }{20} = frac{ (-7.8)^{2} }{20} = frac{60.84}{20} =3.042;$

17.26. =$frac{9 a^{2} }{56} = frac{70.56}{56} =-1.26;$

17.30.  =$frac{14b}{ a^{2}-4 b^{2} } = frac{14*3}{64-36} = 3/2;$