State if `3sqrt(71)` is a surd justify.

Laws of surds

Is ""^4sqrt0.0036 a surd? Justify.

Write whether sqrt(225) is surd or not.

Express the surd 2sqrt(3) as a pure surd.

root(3)(3+sqrt(2)) is a surd . (True/False)

Is the sequence 3,3 + sqrt(2), 3+ 2sqrt(2) , 3+ 3sqrt(2) , .... an A.P. ? Justify.

State whether root(3)(7) is a sqrt or not ?

Express (2)/(3)*sqrt(18) as a pure surd.

Q.Which of the following is/are always true? (a) Every irrational number is a surd.(b) Any surd of the form n sqrt(a)+n sqrt(b) can be rationalised by a surd of the form (n sqrt(a)-n sqrt(b)) a where n sqrt(a) and n sqrt(b) are surds.(c) Both (a) and (b) Neither (a) nor (b)

"State True and False and justify "sin(A+B)=sin A+sin B