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Mathematics 11 Online
OpenStudy (anonymous):

I really need help

OpenStudy (anonymous):

on?

OpenStudy (anonymous):

\[\sum_{k}^{12}=1^{(-2+6k)}\]

OpenStudy (anonymous):

can you find the indicated sum?

OpenStudy (anonymous):

=12

OpenStudy (anonymous):

how did you get that?

OpenStudy (anonymous):

I assume that k goes from 1 to 12

OpenStudy (anonymous):

Find the indicated sum for the arithmetic series.

OpenStudy (anonymous):

if k =1, then the exponent is -2+6 =4 , so that 1^4=1 if k =2 , then the exponent is -2+ 12 = 10 , so that 1^10 =1 until k =12, you have 12 times 1 = 12

OpenStudy (anonymous):

Answer choices are A:888 B:368 C:565 D:444

OpenStudy (anonymous):

if they are options, then recheck your expression, 6k can't be in the exponent

OpenStudy (anonymous):

\[\sum_{k=1}^{12}1^{(-2+6k)}= 1^{(-2+6*1)}+1^{(-2+6*2)}+........+1^{(-2+6*12)}=12\]

OpenStudy (anonymous):

hold on let me draw it

OpenStudy (anonymous):

|dw:1414705446816:dw|

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