AP Questions class 10 cbse
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put an =-1
then solve it
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Answer:
Step-by-step explanation:
The first negative term will be zero
a = 20 , d = -3/4
a(n) < 0
a+(n-1) d<0
20+(n-1)-3/4 < 0
20 + (-3n +3)/4 < 0
20 - 3n+3/4 < 0
(80 -3n +3 )/4 < 0
On transferring 4 to the
83 -3n<0
83 > 3n
83 /3 < n
27.66< n
n = 28
Therefore the 28 term will be the first negative term
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