Answer:
n = 8
Step-by-step explanation:
Continuing the sequence using
+
x₄ = x₂ + x₃ =1 + 2 = 3
x₅ = x₃ + x₄ = 2 + 3 = 5
x₆ = x₄ + x₅ = 3 + 5 = 8
x₇ = x₅ + x₆ = 5 + 8 = 13
x₈ = x₆ + x₇ = 8 + 13 = 21
x₉ = x₇ + x₈ = 13 + 21 = 34
x₁₀ = x₈ + x₉ = 21 + 34 = 55 ← with n = 8
The Fibonacci numbers are
1
2
3
5
8
13
21
34
55
The eighth Fibonacci Number is 21, the ninth is 34 and the tenth is 55.
So Fibonacci # 8 + Fibonacci Number #9 = Fibonacci# 10
21 + 34 = 55
If you want to read a little bit more about Fibonacci numbers, try this page: http://www.1728.org/fibonacci.htm
that's my website :-)
x=3
4-2x-4=-2-4
-2x=-6
\frac{-2x}{-2}=\frac{-6}{-2}
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Yes
That number is irrational because it does not repeat and rational number repeats
and 
, what is the value of n for which 
? (see attachment)
