Find the sum of the series 5 + 7 + 9+ 10 + 13 + 13 + 17 + 16 +..

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Advertisement

Arithmetic Progressions

Short Answer Type

61. Find the sums given below:
34 + 32 + 30 + . . . + 10

129 Views

62. Find the sums given below:
–5 + (–8) + (–11) + . . . + (–230)

154 Views

63.

In an AP
Given a = 5, d = 3, a_n=50, find n and S_n.

217 Views

64.

In an AP
given a = 7, a₁₃=35, find d and S₁₃.

458 Views

Advertisement

65.

In an AP
Given a₁₂ = 37, d = 3, find ‘a’ and S₁₂.

538 Views

66. Given a₃ = 75, S₁₀ = 120, find ‘d’ and a_10.

135 Views

67.

In an AP
Given d = 5, 5₉ = 75, find ‘a’ and ‘a’

182 Views

Advertisement

68. Find the sum of the series 5 + 7 + 9+ 10 + 13 + 13 + 17 + 16 +.........to 40 terms.

Solution not provided.
Ans. 1570

230 Views

Advertisement

Advertisement

69. Find four numbers in A .P. whose sum is 20 and the sum of whose squares is 180.

253 Views

70. Prove that no matter what the real numbers ‘a’ and ‘b’ are the sequence with nth term a + nb is always an A .P. what is the common difference ? What is the sum of the first 20 terms.

256 Views

6
7
8

Advertisement