joeyxmas25 joeyxmas25

03-09-2021
Mathematics

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Find an explicit formula for the arithmetic sequence -5,13,31,49,...
Note: the first term should be b(1).

b(n) = ?

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ferrybukantoro ferrybukantoro

03-09-2021

Step-by-step explanation:

b(n) = b(1) + (n-1) d, where d is the difference,

d = 13-(-5) = 18

b(n) = (-5) + (n-1)(18)

= -5 +18n -18

b(n) = 18n -23

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