Stock market 2

For the week of July 22, the forecaster recorded the following day-to-day changes in the stock market of a specific stock: -2 on Monday; +4 Tuesday; -8 Wednesday; + 2 1/2 Thursday; - 3 1/4 Friday. The stock began the week at 78 points. How many points did it finish with at the end of the week?

Correct answer:

a5 =  68.75

Step-by-step explanation:

a0=78 a1=a02=782=76 a2=a1+4=76+4=80 a3=a28=808=72 a4=a3+(2+21)=72+(2+21)=2149=7421=74.5 a5=a3(3+41)=72(3+41)=4275=6843=68.75

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