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OpenStudy (anonymous):
what are the next two numbers in the pattern bellow 7,21,63,189..... Medals Will Be Given
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OpenStudy (anonymous):
pattern is multiply by 3 189 * 3 =567 567*3 = 1701
OpenStudy (anonymous):
it's a GP with r= 3
OpenStudy (anonymous):
an=a1*(r^(n-1))
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