Решите уравнение: 2^2x-6*2^x+8=0
замена 2^x=t? t>o
t^2-6t+8=0
t1=2 2^x=2 x=1
t2=4 2^x=4 x=2
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замена 2^x=t? t>o
t^2-6t+8=0
t1=2 2^x=2 x=1
t2=4 2^x=4 x=2