Question

first second and fourth term of a preparation are respectively 5.2 3.9 and 3 find the third term

Answer 1

a=5.2 and d= -1.3

we have to find 3rd term
Therefore a+(n-1)×d

a3= 5.2+(3-1)×(-1.3)
5.2+2×(-1.3)
5.2+(-2.6)
5.2-2.6

a3= 2.6