The sequence is , where and .

(a) Find the first terms of the sequence.

Substitute in .

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Similarly,

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(b)

The sequence is .

Find the first terms of the sequence.

Substitute in .

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Similarly,

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(c) Show that .

Consider .

Substitute .

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(d)

The limit value is .

If , .

Therefore, .

The equation is .

Solve the equation.

The solutions of quadratic equation is .

Here and .

Here and are positive.

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(a) .

(b) .

(c) .

(d) .