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OpenStudy (anonymous):
If a1=7 a4=26 for arithmetic series find the missing term . Repeat for. Geometric series HELP PlEASE :(
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OpenStudy (dumbcow):
a4 = a1 + d(4-1) 26 = 7 +3d d = 19/3 a_n = a1+ (19/3)(n-1)
OpenStudy (dumbcow):
a4 = a1*r^4-1 26 = 7*r^3 r = cube root of 26/7 a_n = 7*(26/7)^(n-1)/3
OpenStudy (anonymous):
Wow thanks <33
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