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Meylind2
@Meylind2
June 2021
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РЕШИТЕ УРАВНЕНИЕ ПОЖАЛУЙСТА
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Vas61
(3^cosx)²+2×3^cosx-15=0
3^cosx=t
t²+2t-15=0
t1+t2=-2 t1×t2=-15 t1=-5 t2=3
3^cosx=-5 нет решения
3^cosx=3
cosx=1 x=2πn n∈Z
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Answers & Comments
3^cosx=t
t²+2t-15=0
t1+t2=-2 t1×t2=-15 t1=-5 t2=3
3^cosx=-5 нет решения
3^cosx=3
cosx=1 x=2πn n∈Z