In 2013, a research company found that smartphone shipments (units sold) were up 32.7% worldwide from 2012, with an expectation for the trend to continue. If 959 million units were sold in 2013, how many smartphones can be expected to sell in 2018 at the same growth rate?

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Elise Bradford

7 January, 21:03

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Preston Delacruz · Answer 1

We're looking for a, b such that

/dfrac{9x-20}{ (x+6) ^2}=/dfrac a{x+6}+/dfrac b{ (x+6) ^2}