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0
2022-10-23 19:55:48
ta có ABCD là hình bình hành
=> AD//BC,ad=bc
mà MN là trung điểm AD,BC
=> DM//BN,DM=B1
=>DMBN là hình bình hành
=.BM//DN->PM//DQ
Mà m là trung điểm AD
MP là trung điểm AD
P là trung điểm AQ
PA=PQ
tương tự cq=cp
AP=PQ=QC
2022-09-18 21:50:11
A=(x-2)(x^4+2x^3+4x^2+8x+16 với x=3
Giải
A=(3-2).(3^4+2.3^2+4.3^2+8.3+16)
=1.(81+2.27+4.9+24+16)
=81+54+36+24+16
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