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Mathematics 17 Online
OpenStudy (anonymous):

closed

OpenStudy (anonymous):

To get to the next term each time, we are adding 7. Do you see that pattern? How many times do we need to add 7 to get to the 4000th term?

OpenStudy (anonymous):

oooo close! We need to add 7 3,999 times 1 time to get to the 2nd term 2 times for 3rd term. 3 times for 4th term ... 3999 times for 4000th term

OpenStudy (anonymous):

so 4 + 3999*7

OpenStudy (anonymous):

no 4 + 3999*7 = 4 + 27993 = 27997

OpenStudy (anonymous):

yes

OpenStudy (the_fizicx99):

a_n = a1 + d(n-1) a_1000 = 17 + 4(1000-1) A-1000 = 17 + 3,996 a_1000 = 4,013

OpenStudy (the_fizicx99):

Oh negative, -4 * 999 = -3,996 + 17 = a_1000 = -3,979

OpenStudy (the_fizicx99):

You need to use grouping because its more than 3 terms, its a polynomial. Unfortunately I have to get off :/

OpenStudy (whpalmer4):

You had this problem open already, but you closed it.

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