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OpenStudy (anonymous):
find the indicated sum for (-7)+(-4)+(-1)+2+5+....131
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OpenStudy (anonymous):
first you have to find the number of terms by the following formula an = a1 +(n-1)d
OpenStudy (anonymous):
yeah i did that but got the answer wrong
OpenStudy (anonymous):
put an = 131 d = 3 and a1= -7
OpenStudy (anonymous):
what you got the value for n
OpenStudy (anonymous):
????????????????????????????????????
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OpenStudy (anonymous):
45
OpenStudy (anonymous):
its 47
OpenStudy (anonymous):
|dw:1368033418491:dw|
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