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Find the first positive term of A.P. -65,-58,-51...

Posted by Kavana Tn 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Jagdish 5 years, 11 months ago

For first positive term an>0 a+(n-1)d>0 -65+(n-1)7>0 -65+7n-7>0 7n>72 n>72/7 Therefore 11th term of given A.P. is postive a11=-65+(11-1)7 a11=-65+70=5

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CBSE > Class 10 > Mathematics