Math Textbook - Tumblr Posts

it does not appear to be at all relevant to the topic/subject math textbook like it just looks like an image that hasn't loaded? but why would I'm just so confused dude it's like 'sign into facebook and connect with friends' or whatever right under the 'continuity of a function' heading and right above a paragraph about you guessed it continuity in functions textbook calculus facebook weird what the heck

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