Q&A What will be the nth term of an arithmetic progression if the sum of its n term is given by 2n^2+n

Multiple choice a, 2a − 1, 3a − 2, 4a − 3, . . .For a particular number a, the first term in the sequence above is equal to a, and each term thereafter is 7 greater than the previous term. What is the value of the 16th term in the sequence

Multiple choice Which one is the formula for the general term of the arithmetic sequence -\dfrac{1}{3},\dfrac{1}{9},-\dfrac{1}{27},\dots

Q&A Given a geometric sequence with the common ratio q (q>1) and the number of terms m, removing one of the terms from the sequence will result in a new sequence. Find the values of m and q if the new sequence is an arithmetic sequence.

Multiple choice The first four terms of an Arithmetic Progression whose first term is -2 and the common difference is -2 is

Q&A If \dfrac{1}{a},\dfrac{1}{b}, \dfrac{1}{c} is an arithmetic sequence, and a\ne b , verify a, b, c could not form an arithmetic sequence.

Multiple choice Insert a series of numbers between two numbers a and b, such that the new sequence which has n+2 terms, is an arithmetic sequence, then the common difference of the sequence is