gneet    TOPIC : Sequence and Series Number of questions are 79
Questions from exercise 6A Q.1 - 25;   exercise 6B Q.26 - 49  exercise 6C Q50 - 79 Select_Question:

EXERCISE SET 6 A Q.1
Q.1) The nth element of the sequence 1, 3, 5, 7,….…..is

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Correct

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The sequence is 1, 3, 5, 7, .......
The first term a = 1 , difference d = 3 - 1 = 2.
The nth term an = a + (n-1)d
= 1 + (n-1)2
=1 + 2n - 2
=2n - 1.
Answer : (b)



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