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If the 9th term of an A.P. be zero, then the ratio..
1.
If the 9th term of an A.P. be zero, then the ratio of its29thand 19thterm is
A.
1 : 2
B.
2 : 1
C.
1 : 3
D.
3 : 1
Answer» C. 1 : 3
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