which term of an AP:7.3,6.9,6.5,6.1... is the first negative term
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A.P : 7.3,6.9,6.5,6.1...
a=7.3,d=6.9-7.3=-0.4
First negative term =an
We know 0.4*18=7.2
an =a+(n-1)d
Taking n-1 =18
an =0.1
Now if we take n-1=19
an = 7.3-7.6=-0.3
Therefore n-1=19 term is first negative. That means n=19+1=20
Hence 20th term is first negative term
a=7.3,d=6.9-7.3=-0.4
First negative term =an
We know 0.4*18=7.2
an =a+(n-1)d
Taking n-1 =18
an =0.1
Now if we take n-1=19
an = 7.3-7.6=-0.3
Therefore n-1=19 term is first negative. That means n=19+1=20
Hence 20th term is first negative term
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