What is does the question mark stand for ?
Can you rewrite the question ? Only then will I be able to answer it.
? is B (a contant)
Show that the sum of the cubes of the roots of the equation
x3 + B x + 1 = 0
is minus 3.
Show also that there is no real value of B for which the sum of the fourth powers of the roots is
negative.
ANSWER: The majority of candidates worked from S3 + BS1 + 3 = 0
Alternatively, there were those who used the substitution X^3=Y
Now in most of these type of the questions i am only aware of the substitution method... but what is the first method... can someone please explain me... the one regardin summation nd etc
