Maths / Arithmetic Progression / Sum of First n Terms

QUESTION
 

If the sum of 1st n terms of an AP is 2n(n + 3) , what is the value of its 6th term?

OPTIONS
A. 

24

B. 

28

C. 

32

D. 

None of these

Right Option : B

EXPLANATION
Explain TypeExplanation Content
Text

S_n-S_n_-_1=a_n

S_6-S_5=[2X6(6+3)]-[2X5(5+3)]

=(108-80)=28

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