
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 rectangular coordinate system xOy, each point on the ellipse $x^{2}+ \frac {y^{2}}{4}=1$ has its abscissa remain unchanged, and its ordinate becomes half of the original. Thus, we obtain the curve C. Establish a polar coordinate system with the coordinate origin as the pole and the positive half of the x-axis as the polar axis. The polar equation of line l is ρ(sinθ-cosθ)=1.
(1) Write the ordinary equation of curve C and the rectangular coordinate equation of line l;
(2) Given point M(1, 3), and line l intersects curve C at points A and B, find the value of $$\frac {1}{|MA|}+ \frac {1}{|MB|}$$.

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