SS2: Maths – Sequences & Series (A.P & G.P) | Week 1, 2 & 3

Find the 7th term of the sequence:

2, 5, 10, 17, 26…

The nth term of a sequence is T _n = 5+(n – 1) ²

Evaluate T ₄ – T ₆

If U = n(n ² +1)

Evaluate U ₅   – U ₄

Find the number of terms in the arithmetic progression (A.P):

2, -9, -20, ……, -141

Find the 6th term of the sequence:

\( \frac {2}{3}, \; \frac {7}{15}, \; \frac {4}{15} ………..\)

Find the 8th Term of the A.P -3, -1, 1 …

A sequence is given by 2½, 5, 7½, …, if the nth term is 25 find n.

Find the 9th term of the A.P:

18, 12, 6, 0, –6…,

Find the nth term of the A.P: 

11, 4, –3,…

Find the 4th term of an A.P whose first term is 2 and common difference is 0.5.

The eleventh term of an A.P is 25 and its first term is –3. Find its common difference.

The first term of an A.P is equal to twice the common difference. Find, in terms of d, the 5th term of the A.P