if 3rd term and 9th term of A.P 4 and -8 respectively which term of A.P is 0
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Answer:
a+2d=4
a+8d=-8
subtracting both the equation we get
-6d=4
=>d=-2/3
now
a+2×(-2/3)=4
a=16/3
now
0=a+(n-1)d
0=16/3+(n-1)×(-2/3)
n-1=8
=>n=9. ans.
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