What is the value of x ?What is the value of x ?
please explain ..
thanks in advance
(1) x^4 = |x|
. Square both sides: x^8=x^2
, or x=1
. Not sufficient.
(2) x^2> x
. Rearrange and factor out x
to get x(x-1)>0
. The roots are x=0
" sign means that the given inequality holds true for: x<0
(check here: x2-4x-94661.html#p731476
). Not sufficient.
(1)+(2) The only value of x
from (1) which is in the range from (2) is x=-1
Thanks for the crystal clear approach .. Could you help me with a link here to grasp the concept on Absolute value type questions
. I still get problems related to them wrong . Appreciate your help .