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shevchenkosvetl
@shevchenkosvetl
July 2022
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решить уравнение
4^x-14*2^x-32=0
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ribinaolga
4=2²
4^x=2^2x
2^2x-14*2^x-32=0
2^x=t≥0
t²-14t-32=0
D=49+32=81
t1=7-9=-2<0
t2=7+9=16
2^x=16 2^x=2^4 x=4
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Answers & Comments
4^x=2^2x
2^2x-14*2^x-32=0
2^x=t≥0
t²-14t-32=0
D=49+32=81
t1=7-9=-2<0
t2=7+9=16
2^x=16 2^x=2^4 x=4