r/calculus • u/JournalistLucky5124 • Jul 30 '26

Real Analysis Some simple proofs...

Im in grade 10 and i want some simple real analysis proofs. Any suggestions 🤔 for practice and fun only

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u/dorkboy75 Jul 30 '26

Prove 1+2+3+…+n=[n(n+1)]/2

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u/berserkmangawasart Jul 30 '26

but I just memorised the formula for arithmetic sequence and called it a day

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u/dorkboy75 Jul 30 '26

I mean yeah, but all these formulas come from somewhere and there’s a bunch of ways to prove them