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aninaannochka
@aninaannochka
July 2022
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Решить неравенство 4*3^x+9*3^(x-1)>63
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Gviona
4*3^x + 9*3^(x-1)>63
4*3^x + 9*(3^x/3) >63
Умножим обе части неравенства на "3":
12*3^x+9*3^x>189
3^x(12+9)>189
21*3^x>189
3^x>9
3^x>3^2
x>2
1 votes
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Answers & Comments
4*3^x + 9*(3^x/3) >63
Умножим обе части неравенства на "3":
12*3^x+9*3^x>189
3^x(12+9)>189
21*3^x>189
3^x>9
3^x>3^2
x>2