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OpenStudy (anonymous):
:D
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hartnn (hartnn):
could you find the equation of line ?
hartnn (hartnn):
you get what ?
hartnn (hartnn):
yes! thats correct :)
hartnn (hartnn):
no problem ! sure :)
hartnn (hartnn):
a1 = 1st term = 4
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hartnn (hartnn):
yes! B is correct :)
hartnn (hartnn):
first find the common ratio =r = 2nd term/ 1st term
hartnn (hartnn):
a1 = 1st term = -4 and since we need sum of 8 terms, n = 8 the formula is \(\Large S_n = a_1 \dfrac{r^n-1}{r-1}\)
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