5) Verify that a+(b+c)=(a+d)+c by taking a=1/2, b=3/4, and c=-2/3
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In place of (a+d)+c, it should be (a+b)+c.
Answer according to that:
LHS = a+(b+c)
=1/2+(3/4+(-2/3))
=1/2+((9-8)/12)
=1/2+1/12
=(6+1)/12
=7/12.
RHS = (a+b)+c
=(1/2+3/4)+(-2/3)
=((2+3)/4)-2/3
=5/4-2/3
=(15-8)/12
=7/12.
LHS=RHS.
Therefore, it is proved.
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