Hi everyone just stuck on thesr Qs
Q.1: Given that x^2+x-1=0 find the exact value of x^5-5x
Q2.Given that x=(√2 +1)^1/3-(√2 -1)^1/3, find the exact value of x^3+3x-1
Q3.a, b, c,d are the positive real numbers when a>b>c>d. Given that bcd=a/9, acd=b, abd=9c/4 and abc=4d. Find the value of...