surd

surd surd和irrational number的区别比如为什么example of a number which is irrational,but not a surd是π和e 这两句话啥意思?1,is a surd2,is not a surd Let f(x)=25x^2+kx+2,where k is real.(a) If f(x)=0 has equal roots,find the value(s) of k,leaving your answer(s) in simplest surd form.(3marks)(b) If a is the smaller positive root of the quadratic equation f(x)=0,and one root is half of the other,exp