Multiple Choice Question (MCQ)
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

×
\dfrac{ba}{n}

✓
\dfrac{ba}{n+1}

×
\dfrac{ba}{n+2}

×
\dfrac{a+b}{n+1}