12¹⁰ 12²⁰ 12¹⁰⁰ (2*2*3)⁵⁵⁰ 6⁵⁵⁰
------- * ------ * ........* --------- = -------------- = ------
10¹⁰ 10²⁰ 10¹⁰⁰ (2*5)⁵⁵⁰ 5⁵⁵⁰
10+20+30+.....+100 = 10(1+2+3+....+10)=10*(10*11/2)= 550
6⁵⁵⁰ 6 4x
----- = (-------)⁰,⁴ˣ => 550 = 0,4x => ------- = 550 => 4x=5500 => x= 1375
5⁵⁵⁰ 5 10