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OpenStudy (anonymous):
help me foh's lol
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OpenStudy (anonymous):
OpenStudy (anonymous):
@freckles
OpenStudy (anonymous):
@just_one_last_goodbye
OpenStudy (anonymous):
Sn=2+5+8+...(3n-1)=n(1+3n)/2
OpenStudy (anonymous):
yes
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OpenStudy (anonymous):
\[S1 : 2=1*(1+3*1)/2=2\] 2=2 S1 is true. S2 :2+5=2*(1+3*2)/2 7=7 S2 is true. S3 : 2+5+8=3*(1+3*3)/2 15=15 S3 is true.
OpenStudy (anonymous):
thnx mate
OpenStudy (anonymous):
yw
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