a cube + 1 / a cubewhere a =2+√3
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a cube+1/a cube can be written as (a+1/a)(a square + 1/a square +1) a=2+√3 so 1/a is 2-√3 so a+1/a is 4 , a square +1/a square +1 = (a+1/a) square -1 so answer is 60 since 4(15)
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a^3+1/a^3
Put the valu of a=2+√3
=(2+√3)^3+1/(2+√3)^3
=8+3√3+3×2×√3(2+√3)+1/8+3√3+3×2×√3(2+√3)
=8+3√3+6√3(2+√3)+1/8+3√3+6√3(2+√3)
=8+3√3+12√3+18+1/8+3√3+12√3+18
=26+15√3+1/26+15√3
=1352+780√3/26+15√3
Hope it helps you
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Put the valu of a=2+√3
=(2+√3)^3+1/(2+√3)^3
=8+3√3+3×2×√3(2+√3)+1/8+3√3+3×2×√3(2+√3)
=8+3√3+6√3(2+√3)+1/8+3√3+6√3(2+√3)
=8+3√3+12√3+18+1/8+3√3+12√3+18
=26+15√3+1/26+15√3
=1352+780√3/26+15√3
Hope it helps you
Mark me as brainliert!!!
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