Question 46850
1.)Square root of 1/x = x^-1\2
OK if negative exponents are allowed.
Otherwise:[sqrtx]/x
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2.)(x^1/2 + y^1/2)^2 = x+y
NO. You have to use FOIL, as follows:
(sqrtx + sqrty)^2 
=(sqrtx + sqrty)(sqrtx+sqrty)
=x+2(sqrtx)(sqrty)+y
=x+2sqrt(xy)+y
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3.)1ne^3=3
TRUE
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4.)1n x^2=(1n x)^2 
NO
lnx^2 = 2lnx
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Cheers,
Stan H.