Question

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Answer 1

Step-by-step explanation:

11) (i) Square both sides

(a - 1/a)^2 = 2^2

Expanding

a^2 - 2(a)(1/a) + 1/a^2 = 4

a^2 - 2 + 1/a^2 = 4

a^2 + 1/a^2 = 4+2

a^2 + 1/a^2 = 6 (Proved)

11) (ii) Squaring the answer to part (i)

(a^2 + 1/a^2)^2 = 6^2

Expanding

(a^2)^2 + 2(a^2)(1/a^2) + (1/a^2)^2 = 36

a^4 + 2 + 1/a^4 = 36

a^4 + 1/a^4 = 36 - 2

a^4 + 1/a^4 = 34 (Proved)

Answer 2

Answer:

Your answer is in the picture....

Step-by-step explanation:

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