Question

Solve the following recurrence relation:

 T(n)=9T(n-1)-20T(n-2)

T(0)=-3

T(1)=-10

a)2.5ⁿ-5.4ⁿ

b)3.5^n-4.3ⁿ

c)3.4ⁿ-2.5ⁿ

d)4.5ⁿ-2.3ⁿ

can it be solved by substitution..?

Comments

@gari,

it is, $2*5^n-5*4^n$

---

ohh.... Thanku so much @ joshi_nitish ... It was a poor doubt . 

---

its not a decimal point it gives -30 in both ways