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OpenStudy (anonymous):
Write the sum using summation notation, assuming the suggested pattern continues. 8 - 40 + 200 - 1000 + ... PLEASE HELP I GIVE MEDALS !
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OpenStudy (zpupster):
OpenStudy (zpupster):
8x(-5)^0 = 8 8x(-5)^1= -40 8x(-5)^2= 200 8x(-5)^3= -1000 n= end, start n=0, formula = 8(-5)^n
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