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a) \(34^2+66^2+68.66=\left(34+66\right)^2=10000\)
b) \(74^2+24^2-48.74=\left(74-24\right)^2=2500\)
\(\left(34+66\right)^2-2.34.66+68.66=100^2=10000\)
ý b tương tự nhé
a) 342+662+68.66 = 342+2.34.66+662=(34+66)2 = 1002 = 10000
b) 742+242-48.74 = 242 - 2.24.74+742 = (24 - 74)2 = (-50)2 = 2500
a) 34^2 + 66^2 + 68.66=342+2.34.66+662=(34+66)2=1002=10000
b) 74^2 + 242 - 48.74(câu b 242 mới đúng nhé)
=742-2.24.74+242
=(74-24)2=502=2500
a) 342 + 662 + 68.66 = (34 + 66)2 = 1002 = 10000
b) phải là 242 mới đúng
742 + 242 - 48.74 = (74 - 24)2 = 502 = 2500
a/ \(127^2+146\cdot127+73^2=127^2+2\cdot73\cdot127+73^2=\left(127+73\right)^2=200^2=40000\)
b/ \(100^2-99^2+98^2-97^2+...+2^2-1^2=\left(100^2-99^2\right)+\left(98^2-97^2\right)+...+\left(2^2-1^2\right)\)
\(=100+99+98+97+...+2+1=\frac{\left(100\right)\left(100+1\right)}{2}=5050\)
c/ \(34^2+66^2+68\cdot66=34^2+66^2+2\cdot34\cdot66=\left(34+66\right)^2=100^2=10000\)
342+662+68.66
=342+68.66+662
=342+2.34.66+662
=(34+66)2=1002
=10000
B=(2+1)(22+1)(24+1)(28+1)(216+1)−232
=1.(2+1)(22+1)(24+1)(28+1)(216+1)−232
=(2-1)(2+1)(22+1)(24+1)(28+1)(216+1)−232
=(22-1)(22+1)(24+1)(28+1)(216+1)−232
=(24-1)(24+1)(28+1)(216+1)−232
=(28-1)(28+1)(216+1)−232
=(216-1)(216+1)−232
=232-1-232
=-1
A = ( 2 +1 )( 2^2 + 1 )...(2^16+1) - 2^32
A = ( 2 - 1) ( 2 + 1 )(2^2 + 1) .... (2^16 + 1) - 2^32
A = (2^2 - 1) (2^2 + 1) ...(2^16 + 1) - 2^32
A =( 2^ 4 - 1)( 2^4 + 1 )( 2^8 + 1) (2^16+1) -2^32
A = ( 2^8 - 1)( 2^ 8 + 1) ( 2^ 16 + 1)- 2^32
A = ( 2^16 - 1 )( 2^16 + 1) - 2^32
A = 2^32 - 1 - 2^32
A = - 1
D = 342 + 2.34.66 + 662 = (34 + 66)2 = 1002 = 10000
^_^