a) = 2^12 . 2^2 . 2^40
= 212+2+40
= 2^54
b)= 3^5 . 3^3 . 3^8
= 35+3+8
= 3^16
c)= 5^4 . 5^2 . 5^3
= 54 + 2 +3
= 5^9
a) 84. 22.1610 = (23)4.22.(24 )10= 212 .22.240=254
b) 35.27.812 = 35.33.( 34) 2 = 35 . 33.38 = 316
c) 252.52.125 =(52)2 .52.53= 54.52.53= 59
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