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20 10 what's the answer to the number 13 math problem in Zhejiang college entrance examination?
Is it a problem of analytic geometry in science? Analysis: from the meaning of the question

F (p/2,0), a (0,2), ∴ b (p/4,1), on the parabola, we get 1 = 2p * p/4, ∴ p = ∴ 2. That is, b (∴ 2/4.

∴d=√2/4-(-√2/2)=3√2/4