Question

f a = 7 – 4√3 , then find the value of √ +1/√a

Answer 1

Answer:

1/a=1/(7-4√3)=(7+4√3)/{(7-4√3)(7+4√3)}

=(7+4√3)/(49-48)=7+4√3

1/√a=√(4+4√3+3)=√{2^2+2×2×√3+(√3)^2}

=√{(2+√3)^2

√(1/√a)=(2+√3) Ans