Первое число - 100х + 10у + 7
Второе число - 700 + 10х + у
<span>(100х + 10у + 7)*3 - 17 = <span>700 + 10х + у</span></span>
<span><span><span>300х+30у+21-17= 700+10х+у</span></span></span>
<span><span><span><span>290х+29у=696 </span></span></span></span>
<span><span><span><span><span>10х+у=24 </span></span></span></span></span>
<span><span><span><span><span><span>т.е. х=2, подставим его в любое уравнение получим - у=4 ...От сюда... <span>числа 247 и 724</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span>
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<span><span><span><span><span><span><span>Проверка:</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>247*3=741</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span><span>741-17=724</span></span></span></span></span></span></span></span></span>
Решение
b₁ = 4
q = 1/4
b₇ = b₁ * q⁶
b₇ = 4 * (1/4)⁶ = 1/1024
(10x-4)(3x+2)=0
10х-4=0 3х+2=0
10х=4 3х=-2
х=4:10 х₂=-2/3
<span>х₁=2/5=0,4</span>