SOLUTION: log(x, 2)= -2 log(x, 0.4)= 2

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Question 668395: log(x, 2)= -2
log(x, 0.4)= 2
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

log%28x%2C+2%29=+-2 ⇒ x%5E%28-2%29+=+2 ⇒ x%5E2+=+1%2F2, x = sqrt%282%29%2F2 



log%28x%2C+0.4%29=+2⇒ x%5E%282%29+=+4%2F10⇒  x+=+2%2Fsqrt%2810%29+=+sqrt%2810%29%2F5