CHAPTER-5 ARITHMETIC PROGRESSIONS (SET-3)

Questions in this test

1. If an AP, Sp=q, sq= p and Sr denotes the sum of first ‘r’ terms. Then Sp+q is equal to
2. If Sr denotes the sum of the first ‘r’ terms of an AP then $S_{3n}:S_n$ is
3. If the first term of an AP is 2 and cd is 4, then sum of its 40 terms is
4. The no. of terms of AP 3, 7, 11,15 to be taken so that the sum is 406 is
5. Sum of n terms of the series $\sqrt{2}+\sqrt{8}+\sqrt{18}+\sqrt{32}+...\ is$
6. The $9^{th}$ term of an AP is 449 and $449^{th}$ term is 9. The term which is equal to zero is
7. If $\frac{1}{x+2},\frac{1}{x+3},\frac{1}{x+5}$ are in AP then $x =$
8. The $n^{th}$ term of an AP the sum of whose ‘n’ terms is Sn 5 is
9. The common difference of an AP the sum of whose ‘n’ terms is Sn, is
10. If the sum of ‘n’ terms of 2 arithmetic progression are the ratio $\frac{3n+5}{5n+7}$, then their $n^{th}$ terms are in the ratio