Toán 8:

L

lananh_1998

=1/2(5^2-1)(5^2+1)(5^4+1)(5^8+1)(5^16+1)
=1/2(5^4-1)(5^4+1)(5^8+1)(5^16+1)
=1/2(5^8-1)(5^8+1)(5^16+1)
=1/2(5^16-1)(5^16+1)
=1/2(5^32-1)
 
Top Bottom