Question

Will give medal: If a1 = 1 and a2 = 1 and An = A n - 1 + A n - 2, then what is A4?

Thanks c:

Answer 1

Evaluate A4 by using the expression given: An=An-1 +An-2
To do that, just Substitute n by 4.
Then you will have to find a value for A3 using the same initial expression and the values given for A1 and A2
Finally, you'll be able to find the value of A4.
So, Go ahead! I'll be there to help you.