Using first and second differences, calculate the next three terms in the following sequence.

7, 9, 15, 26, 43, . . .

a.

67, 99, 140

c.

66, 98, 139
b.

72, 106, 149

d.

66, 98, 141

Respuesta :

67, 99, and 140

The numbers in the third below increase by 1 for each consecutive set. i.e
7       9      15     26     43
    2       6        11     17
         4         5       6