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Which term of AP 5,2,-1,.........is -49

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Which term of AP 5,2,-1,.........is -49

Posted by Yuvraj Singh 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Mokashi Kaveri 3 years, 1 month ago

a=5 d= -3 Using formula an =a+(n-1)d -49= 5+(n-1)-3 -49-5=-3(n-1) -54=-3(n-1) -54/3=(n-1) 18=(n-1) n=19

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