DRDO Multi tasking staff Model paper 7

(3 + √2) + [1/(3 + √2)] + [1/(3 – √2)] + (3 – √2)
⇒ (3 + √2) + (3 – √2) / [(3 + √2)(3 – √2)] + (3 + √2) / [(3 + √2)(3 – √2)] + (3 – √2)
⇒ (3 + √2) + (3 – √2)/7 + (3 + √2)/7 + (3 – √2)
⇒ 3 + 3/7 + 3/7 + 3
⇒ 48/7