If a = √2+1 and b = √2-1, then the value of 1/(a+1) + 1/(b+1) is-
সমাধান
সঠিক উত্তর: Option B
দেওয়া আছে,
1/(a+1) + 1/(b+1)
= 1/(√2+1+1) + 1/(√2-1+1)
= 1/(√2+2) + 1/√2
= (√2+√2+2)/√2(√2+2)
= (2√2+2)/(2+2√2)
= (2+2√2)/(2+2√2)
= 1
