Use mathematical induction to prove the statement is true for all positive integers n.
10 + 20 + 30 + ... + 10n = 5n(n + 1)
Can someone please help explan this! thank you!

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if i remember correctly with perpendicular stuff you just take away the negative

if this is really you s much. i only have 3 points left and i have 2 questions to ask

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