[tex]\displaystyle\bf\\3ab^{4} =5\\\\ab^{4} =\frac{5}{3} \\\\1)\\\\1,2ab^{4} =1,2\cdot \frac{5}{3} =\frac{12\cdot 5}{10\cdot 3} =2\\\\2)\\\\\Big(ab^{4} \Big)^{3} =\Big(\frac{5}{3} \Big)^{3} \\\\\\a^{3} b^{12} =\frac{125}{27} \\\\\\27a^{3} b^{12} =27\cdot \frac{125}{27} =125\\\\3)\\\\\Big(ab^{4} \Big)^{2} =\Big(\frac{5}{3} \Big)^{2} \\\\\\a^{2} b^{8} =\frac{25}{9} \\\\\\-12a^{2} 8^{2} =-12\cdot \frac{25}{9} =-33\frac{1}{3}[/tex]
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[tex]\displaystyle\bf\\3ab^{4} =5\\\\ab^{4} =\frac{5}{3} \\\\1)\\\\1,2ab^{4} =1,2\cdot \frac{5}{3} =\frac{12\cdot 5}{10\cdot 3} =2\\\\2)\\\\\Big(ab^{4} \Big)^{3} =\Big(\frac{5}{3} \Big)^{3} \\\\\\a^{3} b^{12} =\frac{125}{27} \\\\\\27a^{3} b^{12} =27\cdot \frac{125}{27} =125\\\\3)\\\\\Big(ab^{4} \Big)^{2} =\Big(\frac{5}{3} \Big)^{2} \\\\\\a^{2} b^{8} =\frac{25}{9} \\\\\\-12a^{2} 8^{2} =-12\cdot \frac{25}{9} =-33\frac{1}{3}[/tex]