Question

pls answer this question.....​

Answer 1

Step-by-step explanation:

a = (√5+√4 )^-3 ,. b = (√5-√4)^-3

ab = (√5+√4)^-3 (√5-√4)-3

= {(√5+√4)(√5-√4) }^3

= 1

(a+1)^-1 + (b+1)^-1 =. 1/(a+1) + 1/(b+1)

= (b+1) + (a+1) / (a+1)(b+1)

= a + b + 2 / ab+a+b+1

= (√5+√4)^-3 +. (√5-√4)^-3 + 2 /

1+ (√5+√4)^-3 + (√5-√4)^-3 + 1

= 1

answer. = (C) = 1

is correct answer