Q2 of 23 Page 1

Attempt of the following sub questions:

Find the eighteenth term of the A.P.:1, 7, 13, 19, …

Given: A.P 1, 7, 13, 19…


nth term of A.P is given by tn = a + (n – 1) × d


where,


a = first term of A.P = 1


d = common difference = 7 – 1 = 6


we have to find the 18th term hence n = 18


⇒ t18 = 1 + (18 – 1) × 6


⇒ t18 = 1 + 17 × 6


⇒ t18 = 1 + 102


⇒ t18 = 103


Therefore 18th term of the A.P 1, 7, 13, 19… is 103


More from this chapter

All 23 →
1

Solve of the following sub question:

If = 25 and = 100, then find the mean .

1

Solve of the following sub question:

Find the value of a, b, c in the following quadratic equation: 2x2 + 18 = 6x.

 2

Attempt of the following sub questions:

Form the quadratic equation if the roots are 3 and 8.

 2

Attempt of the following sub questions:

Solve the following simultaneous equations using Cramer’s rule:
4x + 3y = 4
6x + 5y = 8