x + √3 = 2 হলে x-1 সমান কত?
সমাধান
সঠিক উত্তর: Option A
x + √3 = 2
⇒ x = 2 - √3
x-1
= 1/x
= 1/(2 - √3)
= (2 + √3)/(2 - √3)(2 + √3)
= (2 + √3)/{22- (√3)2}
= (2 + √3)/(4 - 3)
= 2 + √3
⇒ x = 2 - √3
x-1
= 1/x
= 1/(2 - √3)
= (2 + √3)/(2 - √3)(2 + √3)
= (2 + √3)/{22- (√3)2}
= (2 + √3)/(4 - 3)
= 2 + √3
