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Question 1: Select all that apply

mediumAI-checkedNearest Neighbors & Kernel Methods

k1k_1 and k2k_2 are positive semidefinite (PSD) kernels on a set X\mathcal{X} and g:X→Rg:\mathcal{X}\to\mathbb{R} is any function. Which of the following kernels are guaranteed to be PSD? Select all that apply.

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