\(\Leftrightarrow\frac{3x+91}{2}=\frac{113}{1}\Rightarrow\left(3x+91\right)1=2.113\)
\(\Rightarrow\frac{\left(3x+91\right)1}{3x}=\frac{2.113}{3x}\)(chia 2 vế cho 3x)
\(\Rightarrow\frac{3x+91}{3x}=\frac{2.113}{3x}\)
=>x=45
(5 mu 4 + 4 mu 7) (8 mu9 - 2mu 7) (2mu 4-4 mu 2)
bai1
5mu3+3mu5
bai2
(x-1)mu3=125
720/(41-(2*x-5))=2mu 3*5
bai3
1 phan 9 * 3 mu 4 * 3 mu n =3 mu 7
(2 mu 2 chia 4)* 2 mu n = 4
bai4
2 * 2mu2 * 2mu3 * 2mu4 *.......*2 mu100
Cach lam bai (× - 4):5=2mu 4 - 3 mu 2
(2×-9):5=7
4(×-3)= 5 mũ 2 - 1 mũ 10
Nhanh nha sap hoc them oi
cho s= 2+2 mu 2+2 mu 3+ 2mu 4 +....+2 mu 99 +2 mu 100
a, tinh S
b,CHUNG MINH RANG S CHI HET CHO 3
A = 2mu 0 + 2 mu 1 + 2mu 2 + ...+ 2 mu 50
A = 2mu 0 + 2 mu 1 + 2mu 2 + ...+ 2 mu 50
Viet tong A bang 2mu 2+2 mu 3+2 mu 4+...+2 mu 20 duoi dang luy thua cua 2
cho a= 2mu 2+ 2 mu 3+2mu4+....+2mu 12
chung to rang a chia hết cho 39
2mu n +2 mu n+3 =144
