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<span>1)4^(x+1)=64^(x-1)</span>
<span>нет решений</span>
<span>2)<span>2^(x+3)-2^(x+1)=12</span></span>
2^(х+3)-2^(х+1)=3*2^(х+1)
3*2^(х+1)=2^2*3
2^(х+3)-2^(х+1)-12=0
x=1
<span>(5siny+4)(4siny+5)=0
</span><span>5siny+4=0 или 4siny+5=0
5siny=-4 4siny=-5
siny=-0,8 siny=-1,25
<u>y=(-1)^{n+1}arcsin0,8+Пn, n</u></span><u>∈Z </u> Решений нет, т.к. |siny|≤1, а |-1,25|>1
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