1). x^2 / y=x^2*y^-1; 2). m^6 / n^6=m^6*n^-6; 3). (2x-y)^3 / (x-2y)^9=(2x-y)^3*(x-2y)^-9.
Q=3:6 = 1/2
b4 = b1*q³ = 6*1/8 = 6/8= 3/4
S5 = b4(q^5-1)/(q-1) =
=3/4*(1/32-1)/(1/2 -1) = 3/4*(-31/32): (-1/2)= 3/4*31/32*2/1)= =93/64
Ответ: 64*S = 64*93/64 = 93
<span>1) 2x-(1-x)=0
2x-1+x = 0
3x-1=0
3x = 1
x=1/3
2)(3-x)(x+2)(x-1)=0.
3-x=0 x+2=0 x-1=0
x=3 x=-2 x=1
</span>
Ответ:
Переписывать пример не буду, сразу начну решать(1.43):![\frac{(\frac{21}{10}*\frac{1}{2}-1.8)*0.4+0.3 }{0.14}=\frac{(\frac{21}{20}-\frac{18}{10})*0.4+0.3 }{0.14}=\frac{-\frac{15}{20}*0.4-0.3 }{0.14}= \frac{-0.75*0.4-0.3 }{0.14}=\frac{0}{0.14} =0](https://tex.z-dn.net/?f=%5Cfrac%7B%28%5Cfrac%7B21%7D%7B10%7D%2A%5Cfrac%7B1%7D%7B2%7D-1.8%29%2A0.4%2B0.3%20%20%7D%7B0.14%7D%3D%5Cfrac%7B%28%5Cfrac%7B21%7D%7B20%7D-%5Cfrac%7B18%7D%7B10%7D%29%2A0.4%2B0.3%20%20%7D%7B0.14%7D%3D%5Cfrac%7B-%5Cfrac%7B15%7D%7B20%7D%2A0.4-0.3%20%7D%7B0.14%7D%3D%20%20%20%5Cfrac%7B-0.75%2A0.4-0.3%20%7D%7B0.14%7D%3D%5Cfrac%7B0%7D%7B0.14%7D%20%3D0)
![\frac{(\frac{124}{100}-\frac{26}{25})*2.5-\frac{1}{6}*\frac{3}{1} }{12} =\frac{\frac{20}{100}*2.5-\frac{1}{2} }{12}=\frac{0.2*2.5-0.5}{12} = \frac{0}{12} =0](https://tex.z-dn.net/?f=%5Cfrac%7B%28%5Cfrac%7B124%7D%7B100%7D-%5Cfrac%7B26%7D%7B25%7D%29%2A2.5-%5Cfrac%7B1%7D%7B6%7D%2A%5Cfrac%7B3%7D%7B1%7D%20%20%20%20%7D%7B12%7D%20%3D%5Cfrac%7B%5Cfrac%7B20%7D%7B100%7D%2A2.5-%5Cfrac%7B1%7D%7B2%7D%20%20%7D%7B12%7D%3D%5Cfrac%7B0.2%2A2.5-0.5%7D%7B12%7D%20%3D%20%5Cfrac%7B0%7D%7B12%7D%20%3D0)
![\frac{4.34}{10+1.6/(0.6*0.4-0.4)} =\frac{4.34}{10+1.6/(-0.16)} =\frac{4.34}{10-10}=\frac{4.34}{0}](https://tex.z-dn.net/?f=%5Cfrac%7B4.34%7D%7B10%2B1.6%2F%280.6%2A0.4-0.4%29%7D%20%3D%5Cfrac%7B4.34%7D%7B10%2B1.6%2F%28-0.16%29%7D%20%3D%5Cfrac%7B4.34%7D%7B10-10%7D%3D%5Cfrac%7B4.34%7D%7B0%7D)
На ноль делить нельзя, соответственно дробь не имеет смысла.
![\frac{1.1}{\frac{1}{9}+\frac{5}{9}( \frac{4}{30}-\frac{1}{3)} }= \frac{1.1}{\frac{1}{9}+\frac{5}{9}*(-\frac{6}{30}) }=\frac{1.1}{\frac{1}{9}-\frac{2}{18} } =\frac{1.1}{0}](https://tex.z-dn.net/?f=%5Cfrac%7B1.1%7D%7B%5Cfrac%7B1%7D%7B9%7D%2B%5Cfrac%7B5%7D%7B9%7D%28%20%5Cfrac%7B4%7D%7B30%7D-%5Cfrac%7B1%7D%7B3%29%7D%20%20%20%7D%3D%20%5Cfrac%7B1.1%7D%7B%5Cfrac%7B1%7D%7B9%7D%2B%5Cfrac%7B5%7D%7B9%7D%2A%28-%5Cfrac%7B6%7D%7B30%7D%29%20%7D%3D%5Cfrac%7B1.1%7D%7B%5Cfrac%7B1%7D%7B9%7D-%5Cfrac%7B2%7D%7B18%7D%20%20%7D%20%3D%5Cfrac%7B1.1%7D%7B0%7D)
Объяснение: