Question

The value of q2 - 1 equal to​

Answer 1

Answer:

first give full question .

Answer 2

Answer:

please mark me as brainlist....

Step-by-step explanation:ANSWER

Given, S=  

n=1

∑

∞

​  

 

(3n−2)(3n+1)

1

​  

=  

3

1

​  

 

n=1

∑

∞

​  

[  

3n−2

1

​  

−  

3n+1

1

​  

]

S=  

3

1

​  

[(1−  

4

1

​  

)+(  

4

1

​  

−  

7

1

​  

)+(  

7

1

​  

−  

10

1

​  

)+....]

S=  

3

1

​  

(1−0)=  

3

1

​  

 

Comparing with S=  

q

p

​  

⇒p=1q=3

p  

2

+q  

2

=1  

2

+(3)  

2

=10

∴ Option C is correct