
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the Cartesian coordinate system $xOy$, the parametric equation of curve $C_1$ is $$\begin{cases} x= \frac {3}{2}\cos\alpha \\ y=\sin\alpha \end{cases}$$ ($\alpha$ is the parameter). Let $M$ be a moving point on $C_1$, and point $P$ satisfies $\overrightarrow {OP} = 2\overrightarrow {OM}$. The trajectory of point $P$ is curve $C_2$.  
(Ⅰ) Find the general equation of $C_2$;  
(Ⅱ) If point $(x, y)$ is on curve $C_2$, find the range of values for $x+2y$.

Present the answer in LaTex format: \boxed{Your answer}
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