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Sequences and Series

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Question 2

A sequence u1,u2,u3,… u_1, u_2, u_3, \dots\,u1​,u2​,u3​,… is defined by

u1=3un+1=(un−3)2+2,n≥1 \begin{aligned}u_1 &= 3 \\u_{n+1} &= (u_n - 3)^2 + 2, \quad n \geq 1\end{aligned} u1​un+1​​=3=(un​−3)2+2,n≥1​
a.

Find u2,u3 u_2, u_3\,u2​,u3​ and u4u_4u4​.

[3]
b.

Write down the value of u100u_{100}u100​.

[1]

Sequences and Series Questions

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