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Mathematics 18 Online
OpenStudy (anonymous):

who wants to help me??

OpenStudy (anonymous):

if u can get mine i can get urs

OpenStudy (helder_edwin):

post your question

OpenStudy (anonymous):

Which of the following statements is (are) true for all positive integers?

OpenStudy (anonymous):

1+2+#$+....+n=n(+1/2

OpenStudy (anonymous):

1+3+5+...(2n_1+n^2

OpenStudy (helder_edwin):

u have some typos i believe

OpenStudy (helder_edwin):

is the first one \[ \large 1+2+3+\dots+n=\frac{n(n+1)}{2} \] ???

OpenStudy (anonymous):

ohh yeah 1+2+3+4

OpenStudy (anonymous):

damn sorry guys lol i meant (2n-1)=n^2

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