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OpenStudy (anonymous):
Find S10 for (-1) + (-7) + (-13) + (-19) +... A. 250 B. -280 C. (-23) D. 132 HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
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OpenStudy (dls):
common difference = -6 a=-1 n=10
OpenStudy (dls):
and it is an AP
OpenStudy (dls):
\[S_n=\frac{n}{2}(2a+(n-1)d)\]
OpenStudy (anonymous):
the answes ar eup there i just need which one is it
OpenStudy (dls):
we are not here to give answers,solve yourself
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OpenStudy (anonymous):
the othe rguy gav eme answers meanyyyyyyyyyyyyyyyyyy
OpenStudy (dls):
@hartnn badtameezi kar raha hai ye :(
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