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A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
Write the first five terms of the sequences whose nth term is an = (- 1)n - 1 5n + 1
Solution:
nth term is given as an = (- 1)n - 1 5n + 1
Substituting n = 1, 2, 3, 4, 5
a1 = (- 1)1 - 1 51 + 1 = 52 = 25
a2 = (- 1)2 - 1 52 + 1 = - 53 = - 125
a3 = (- 1)3 - 1 53 + 1 = 54 = 625
a4 = (- 1)4 - 1 54 + 1 = - 55 = - 3125
a5 = (- 1)5 - 1 55 + 1 = 56 = 15625
Therefore, the required terms are 25, - 125, 625, - 3125, and 15625
NCERT Solutions Class 11 Maths Chapter 9 Exercise 9.1 Question 5
Write the first five terms of the sequences whose nth term is an = (- 1)n - 1 5n + 1
Summary:
The questions tells us that the nth term is an = (- 1)n - 1 5n + 1. Therefore the terms are 25, - 125, 625, - 3125 and 15625
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