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08-05-2017
Mathematics

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The product of the number on two consecutive volume of research is 420, find volume number

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dondon6214 dondon6214

08-05-2017

20 or 21 anyone will work

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08-05-2017

v= volume number
v; v+1

v(v+1) = 420
v^2 + v - 420 = 0
(v-20)(v+21)

v1 = 20 ; v2 = - 21 (void)

20; 21 are the two volume numbers

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