Question

1.Tính nhanh : a.  ( 2 + 4 + 6 + 8 + ... + 2018 ) * ( 125125 * 127 - 127127 * 125 )

giải giùm mk nha!!!!

 

Answer 1

(2+4+6+...+2017+2018)x(125125x127-127127x125)

=(2+4+6+...+2018)x(125x1001x127-127127x125)

=(2+4+6+..+2018)x(125x127127-127127x125)

=(2+4+6+...+2018)x0

=0

k mk nha!!

Chuc bn hok tot

Answer 2

cảm ơn nha

Answer 3

mn k cho mk nha!!!

Answer 4

ta có:

125125*127-127127*125=125*1001*127-127*1001*125=0=>a(2+4+6+8+...+2018)(125125*127-127127*125)=a(2+4+6+8+...+2018)0=0