Find the sum of the following APs:
2, 7, 12, ... to 10 terms.
Here, a = 2
d = 7 – 2 = 12 – 7 = 5
And, n = 10
We know that,
= 5 x [4 + 9 x 5]
= 5 x [4 + 45]
= 5 x 49 = 245
Hence, the sum of First 10 terms of the given
A .P. = 245 F
Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = –2, d = 0
Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = 4, d = – 3
Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = – 1.25, d = – 0.25
For the following APs, write the first term and the common difference
3, 1, – 1, – 3, . . .
For the following APs, write the first term and the common difference
– 5, – 1, 3, 7, . . .
For the following APs, write the first term and the common difference
0.6, 1.7, 2.8, 3.9, . . .
Mock Test Series
