A) a / (1-x) = - a /(x-1)
б) a / (1-x) = a(1+x) / (1 - x²)
в) a / (1 - x) = - a(x-1) / ( x² - 2x + 1)
г) a / (1-x) = - a(x² + x + 1) / (x-1)
<span>3*(3^2x) - 7*912^x) + 4*04^2x) = 0
</span><span>3*(3^2x) - 7*(3^x)*(4^x) + 4*(4^2x) = 0 / (4^2x)
3*[(3/4)^2x] - 7*[(3/4)^x] + 4 = 0
</span>(3/4)^x = z
3*(z^2) - 7z + 4 = 0
D = 49 - 4*3*4 = 1
z1 = (7 - 1)/6
z1 = 1
z2 = (7 +1)/6
z2 = 4/3
1) (3/4)^x = 1
(3/4)^x = (3/4)^0
x1 = 0
2) (3/4)^x = 4/3
(3/4)^x = (3/4)^(-1)
x2 = -1
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