[1+3+5+7+...+2011] x [125125 x 127-127127 x 125]
=2028096 x0
=0
Vay phep tinh tren co ket qua = 0
[1+3+5+7+...+2011] x [125125 x 127-127127 x 125]
=2028096 x0
=0
Vay phep tinh tren co ket qua = 0
(1 + 3 + 5 + .... +2007 + 2009 + 2011 ) x (125125 x 127 - 127127 x 125 )
(1+3+5+7...+2011)*(125125+127-127127*125)
( 1 + 3 + 5 + 7+...+2003 + 2005 ) x ( 125125 x 127 - 127127 x 125 ) = ?
Tính :
a) ( 1 + 3 + 5 + 7 + ....... + 2007 + 2009 + 2011 ) x ( 125125 x 127 - 127127 x 125 )
b) \(\frac{1}{3}+\frac{1}{15}+\frac{1}{35}+\frac{1}{63}+\frac{1}{99}+\frac{1}{143}+\frac{1}{195}\)
1.Tính nhanh
a.(1 + 3 + 5 + 7 + ......+ 2011 ) x ( 125125 x 127 - 127127 x 125 )
b.2006x125+1000/126x2006-1006
c.1995/1997 x 1990/1993 x 1997/1994 x 1993/1995 x 997/995
ai lafm đúng thì mình sẽ tick nha
tính nhanh
( 1+3+5+7+...+2003+2005 ) x ( 125125 x 127 - 127127 x 125 )
giúp mik vs
tính=cách hợp lí:
(1+3+5+7+...+2011+2013)×(125125×127-127127)
( 1+ 3+ 5 + ... + 2005 ) * ( 125125*127- 127127 * 125 )
Tính nhanh
( 1+3+5+7+…+2003+2005) x (125 125 x 127 – 127 127 x 125)