Question

plzzz answer the question as fast as you can​

Answer 1

Answer:

a= 3+2√2

1/a = 1/3+2√2 x 3-2√2/3-2√2

1/a = 3 - 2√2

ans.1.

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

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

this implies a^2 +1/a^2 = 34...

ans.2.

(a+1/a)^3 = a^3 +1/a^3 +3a*1/a( a +1/a)

216 = a^3 +1/a^3 +3(6)

a^3 +1/a^3 = 216-18 = 198..

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