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If a + b = a/b = a*b, then find a - b.

 May 6, 2020
 #1
avatar+300 
0

I think a and b are both 0. So, a - b = 0 - 0 = 0 !!!

 May 6, 2020
 #2
avatar+1502 
+2

no, but anythign divided by 0 is undefined.

hugomimihu  May 6, 2020
 #3
avatar+23575 
+1

Two equations    two unknowns

a+b = a/b

a*b = a/b     or   a =  a (1/b^2)

                           1 = 1/b^2            b= 1 or -1

 

a + 1 = a /1

a+1 = a                 no answer for when b = 1

 

a-1 = a /-1

a-1 = -a

2a = 1       a = 1/2               b = -1           then a- b  =   1/2 - -1 = 1 1/2

 May 6, 2020

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