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OpenStudy (anonymous):
Find the 7th and nth term of the sequence 1,-x, x^2 i think i need to use geometric sequence here but i don't know where to start please help..
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OpenStudy (anonymous):
start with -1 and an x ....
OpenStudy (anonymous):
(-1)^0 = 1 (-1)^1 = -1 (-1)^2 = 1 (-1)^3 = -1 (-1)^4 = 1 ... that gets you alternating signs, and the rest is just xs
OpenStudy (anonymous):
(-x)^n seems suitable to me
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