(1+2+3+4+...+2014)*(127*126126-127127*126)
=(1+2+3+4+...+2014)*(127*1001*126-127127*126)
=(1+2+3+4+...+2014)*(127127*126-127127*126)
=(1+2+3+4+...+2014)*0
=0
l-i-k-e cho mình nha bạn.
(1+2+3+4+...+2014)*(127*126126-127127*126)
=(1+2+3+4+...+2014)*(127*1001*126-127127*126)
=(1+2+3+4+...+2014)*(127127*126-127127*126)
=(1+2+3+4+...+2014)*0
=0
l-i-k-e cho mình nha bạn.
Tính
( 1 + 2 + 3 + 4 + 5 + ...... + 2018 ) x ( 126126 x 127127 - 127127 x 126 )
( 1+ 3+ 5 + ... + 2005 ) * ( 125125*127- 127127 * 125 )
[ 1+3+5+7+......+2011] x [125125x 127- 127127 x 125]
(1+3+5+7...+2011)*(125125+127-127127*125)
(1 + 3 + 5 + .... +2007 + 2009 + 2011 ) x (125125 x 127 - 127127 x 125 )
1.Tính nhanh : a. ( 2 + 4 + 6 + 8 + ... + 2018 ) * ( 125125 * 127 - 127127 * 125 )
giải giùm mk nha!!!!
tính=cách hợp lí:
(1+3+5+7+...+2011+2013)×(125125×127-127127)
( 1 + 3 + 5 + 7+...+2003 + 2005 ) x ( 125125 x 127 - 127127 x 125 ) = ?
tính các tổng
A= 1+4+7 +...+19+22
B= 2+5+8+...+11+14+17+20+23+26+29
C= ( 1+3+5 +... +2017 +2019 ) * ( 125125 *127 -127127 *125 )
nhanh mikk tick
mk đg cần gấp