Question

a,9,3a-b,3a+b are in AP the 2011th term of AP is......
please answer​

Answer 1

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Answer 2

Answer:

8045

Step-by-step explanation:

common difference=(3a+b-3a+b)=2b

We can say that, a+(3a-b)=2*9 therefore, 4a-b=18 ....eq1

9+(3a+b)=6a-2b therefore, a-b=3 ....eq2

From equation 1 and 2 we can say a=5,b=2

therefore the common difference=4

So, 2011th term of AP is=a+(n-1)d=5+2010*4=8045