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a(sub1)=4, d= 3; a(sub25)

asked Jun 23, 2016 in Other Math Topics by starapplenine

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1 Answer

a[1]=4, d=3. Sequence is 4, 4+3=7, 4+6=10, ... General term is 4+3(n-1) where n is the number of terms.

Put n=25: 4+3*24=4+72=76. a[25]=76.

answered Jun 23, 2016 by Rod Top Rated User (1.2m points)

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