#### Question

Let the sum of *n*, 2*n*, 3*n* terms of an A.P. be S_{1}, S_{2} and S_{3},_{ }respectively, show that S_{3} = 3 (S_{2}– S_{1})

#### Solution

Let *a* and *b* be the first term and the common difference of the A.P. respectively.

Therefore,

Is there an error in this question or solution?

Solution Let the Sum of N, 2n, 3n Terms of an Arithmetic Progression. Be S1, S2 and S3, Respectively, Show that S3 = 3 (S2– S1) Concept: Arithmetic Progression (A.P.).