dy/dx appears inside a function or power: solve for dy/dx first

1. A.
   $ae^{by} + be^{ax} = c_1$
2. B.
   $ae^{-by} + be^{-ax} = c_1$
3. C.
   $ae^{-by} + be^{ax} = c_1$
4. D.
   $ae^{by} + be^{-ax} = c_1$

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1. A.
   $\ \cos\left( \frac{7}{x} \right) = 1$
2. B.
   $\ \cos\left( \frac{y}{x - 1} \right) = 7$
3. C.
   $\ \cos\left( \frac{y - 1}{x} \right) = 7$
4. D.
   $\ \cos\left( \frac{y}{x} \right) = 7$

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1. A.
   $23$
2. B.
   $14$
3. C.
   $13$
4. D.
   $11$

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1. A.
   $c \cdot e^{(2 \pm \sqrt{3})x}$
2. B.
   $c \cdot e^{(-3 \pm \sqrt{2})x}$
3. C.
   $c \cdot e^{(-2 \pm \sqrt{3})x}$
4. D.
   $c \cdot e^{(3 \pm \sqrt{2})x}$

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1. A.
   $y = x\log x - x + c$
2. B.
   $y = x\log x + c$
3. C.
   $y = 1/x + c$
4. D.
   $y = x.\log x + x + c$

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