Bài 34. Áp dụng phân tích đa thức thành nhân tử để chứng minh chia hết:
1) a2-a chia hết cho 2 ; 2) a3-a chia hết cho 3
3) a5-a chia hết cho 5 ; 4) a7-a chia hết cho 7
5)a3+3a2+2a chia hết cho
6)(n2+n-1)2-1 chia hết cho 24;
7) n3+6n+8n chia hết cho 48 với mọi n chẵn
8) n4-10n2+9 chia hết cho 384 với mọi n lẻ
9) n6+n4-2n2 chia hết cho 72;
10) 32n - 9 chia hết cho 72
11) n3 – n chia hết cho 6 với mọi số nguyên n

answer: 2530

hope this

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

v,jhvljh,b.b; hk; ljujb,vuvccklokll; k,m,km,

step-by-step explanation: