900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 + 900 - 1 = ???????????????????????????????????????????
A=[900-(-2)^2].[900-(-6)^2].[900-(-8)^2].[900-9-88)^2].[900-(-900)^2]
A=[900-(-2)^2].[900-(-6)^2].[900-(-8)^2].[900-9-88)^2].[900-(-900)^2
a=[900-(-2 MŨ 2)].[900-(-6 MŨ 2)].[900-(-8 MŨ 2)].....[900-(-88 MŨ 2)].[900-(900 MŨ 2)]
900+900+900+900=...
\(900+900+900+900\)
\(=900.4\)
\(=3600\)
k mk nhe
900-900-900+900.0+900=
900-900-900+900.0+900=900
chúc bn hok giỏi
A=[900-(-2)2].[900-(-4)2].[900-(-6)2]...[900-(-898)2].[900-(-900)2]
900+900+900+900=
tính nhanh
900 + 900 + 900 + 900
= 900 x 4
= 3600
TÍNH :
A=[900-(-2)^2].[900-(-6)^2].[900-(-8)^2] ... [900-(-88)^2].[900-(-900)^2]
AI GIẢI ĐƯỢC TICK CHO
900 00 + 900 0001 + 900 002 + 900 0003 + 900 004 + 900 005+ ... + 1 000 000 + 1 000 001 + 1 000 0002 + 1 000 003 + 1 000 004 + 1 000 005
Giúp mình với câu này tính nhanh khó lắm
vbuiglllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
= 900 00 + 900 0001 + 900 002 + 900 0003 + 900 004 + 900 005+ ... + 1 000 000 + 1 000 001 + 1 000 0002 + 1 000 003 + 1 000 004 + 1 000 005 nhé bn