Question

if a = 2+√3 then find the value of a-1/a​

Answer 1

Answer:

Step-by-step explanation:

→ Given a = 2 + √3

⇒ (1/a) = 1 / (2 + √3)

→ Multiply and divide by (2 − √3)

⇒ (1/a) = (2 − √3) / [(2 + √3)(2 − √3)]

⇒ (1/a) = (2 − √3) / [4 − 3]

⇒ (1/a) = (2 − √3)

∴ a + (1/a) = (2 + √3) + (2 − √3)

= 4

Answer 2

Step-by-step explanation:

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