Question

нужно срочно please))))

Answer 1

$1)3^{frac{1-x}{x-2} }=frac{1}{9}\\3^{frac{1-x}{x-2} }=3^{-2}\\frac{1-x}{x-2}=-2\\left { {{1-x=-2x+4} atop {xneq2 }} right.\\-x+2x=4-1\\x=3$

$2)(frac{2}{5})^{3x-7}=(frac{5}{2})^{7x-3}\\(frac{2}{5})^{3x-7}=(frac{2}{5} )^{-7x+3}\\3x-7=-7x+3\\3x+7x=3+7\\10x=10\\x=1$

$3)(frac{3}{4})^{x+3}=(frac{4}{3})^{4-2x}\\(frac{3}{4})^{x+3}=(frac{3}{4})^{-4+2x}\\x+3=-4+2x\\x-2x=-4-3\\-x=-7\\x=7$

Answer 2

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