Решите уравнение методом введения новой переменной: 5 2х+1-26•5х+5=0
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11.08.2019 14:30
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2
5^x=a
5a²-26a+5=0
D=676-100=576
a1=(26-24)/10=1/5⇒5^x=1/5⇒x=-1
a2=(26+24)/10=5⇒5^x=5⇒x=1