Respuesta :

12+22+32+42+52+62+72=14012+22+32+42+52+62+72=140 
Okay, So We Know That Each time, We Are Multiplying By 2.8
So:
55 * 2.8 =  154
154 * 2.8 = 431.2
431.2 * 2.8 = 1207.36