Answer:
If x2.x4 and x2= 2x, x4=4x, while . means multiplication. therefore it can be written as 2x × 4x
![y'''+2y''-4y'-8y=0](https://tex.z-dn.net/?f=y%27%27%27%2B2y%27%27-4y%27-8y%3D0)
has characteristic equation
![r^3+2r^2-4r-8=r^2(r+2)-4(r+2)=(r^2-4)(r+2)=(r-2)(r+2)^2=0](https://tex.z-dn.net/?f=r%5E3%2B2r%5E2-4r-8%3Dr%5E2%28r%2B2%29-4%28r%2B2%29%3D%28r%5E2-4%29%28r%2B2%29%3D%28r-2%29%28r%2B2%29%5E2%3D0)
which has roots at
![r=\pm2](https://tex.z-dn.net/?f=r%3D%5Cpm2)
. The negative root has multiplicity 2. So the general solution is
Answer:
p=7
Step-by-step explanation:
2 (5p-4)=3p-7
(10p-8)=3p-7
10p=3p+1
7p=1
p=7
Answer: it triples by 3 so 15,45, 135
Step-by-step explanation: this is by 3 because it goes on by 15,45,135