Question

Q1.Which term of the sequence is the 1st negative term?

a. 29 ¼,28 ½, 27 ¾, …….

b. 19, 14, 9, …….

c. 71, 66, 61, …..

d. 8, 5, 2, …​

Answer 1

Answer:

Since, first term a=17 and comman difference d=16

5

1

−17=

5

81

−17=−

5

4

Let n

th

term be the first negative term.

a

n

<0

a + (n - 1)d < 0

17 + (n - 1) -

5

4

< 0

17 -

5

4

n +

5

4

< 0

n <

4

89

n < 22

4

1

So, 23

rd

term will be the first negative term.

Answer 2

So,23rd term will be the

first negative term