Question

common different=........
a) an+1-an
b) a+(n-1) d
c) a+4d
d) n/2 (2a-(n-1) d​

Answer 1

Answer:

(a) an+1-an

This one is different from other 3 options.

Other 3 i.e , option (b), (c) and (d) are the equations of Arithmetic Progression.