3. What is the line tangent to the curve x2 + y2 = 25 thru (2, 1)? A. 2x + y = 25 B. x + 2y = 5 Cx-2y=0 D. x+y = 3 4. The graph of r = a + bcos ft is a

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A:

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A:

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A: see 2nd step for complete answer.

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A:

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A:

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A:

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A: