If x + 1/x = 5 then x^2 + 1/x^2 = ??
x+1/x=5 sqr both side (x+1/x)^2=5^2 x^2+1/x^2+2=25 so answer is 23
The question gives you x+(1/x)=5 and it is asking for x^2+(1/x^2) well, remember (a+b)^2=a^2+2ab+b^2 Let's square the question given, that gives you x^2+2*x*(1/x)+(1/x^2)=25 since 2*x*(1/x)=2,then x^2+(1/x^2)=25-2=23
(a) 49 (b) 48 (c) 99 (d) 1
If (Sqrt3)^5 * (9^2) = (3^x)*(3*Sqrt3) Then x=??
If we know x + 1/x =2 then what would be the value of x^2048 + 1/x^2048 +x^2047 - 1 / x^2047 + 1/x^2049 - x^2049 +2
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