For Daily Free Study Material Join wiredfaculty Whatsapp Group | Download Android App | Ncert Book Download
Permutations And Combinations
If are in A.P., then prove that are in A.P.
will be in A.P.if will be in A.P. (By adding 1 to each number)if will be in A.P. if will be in A.P. (By dividing each number a + b + c)if if if if (b - a) (b + a) = (c - b) (c + b)if if are in A.P. which is true.Hence, are in A.P.