Решите пожалуйста все
1)найти область определения функции
А)[tex]y= \frac{5x-4}{ \sqrt{ x^{2} -7x+6} } [/tex]
2)решите уравнения
а)[tex]5*2 ^{x+3}-4*2^{x-1}=9,5 [/tex]
b)[tex]2sin ^{2}x+5cosx+1=0 [/tex]
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