Question

2x +1, 4x -1, 5x+1 ..........are in arithmetic sequence. a. Find the value of x? [2] b. Write the sequence? [1] c. What is the nth term? [1] d. Is 2019 a term of this sequence? [1]

Answer 1

Answer:

Given that,

They are in AP,

So the condition is,2b=a+c

2(4x-1)=7x+2

8x-2=7x+2

X=4

The value of x is 4...

B) The sequence is as follows

9,15,21

C)an=a+(n-1)d

an=9+(n-1)6

an=9+6n-6

an=6n+3

So the nth term is 6n+3.....

D)Yes.. 2019 is a term of the sequence... with n=366...

Check it if you can't understand....

Step-by-step explanation:

Hope it helps you frnd......