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| 1. |
If the seventh term of an AP is 1/9 and its ninth term is 1/7 find its 1631st term |
| Answer» a7=a+6d = 1/9.............ia9=a+8d=1/7..... iifrom i and ii2d=1/7 - 1/963 x 2d=9 - 7d=2/63x2=1/63a=19 -6/63=19-2/31=589- 2/31=587/31a1631=587/31+1630 x 1/63 | |