3/a-7/2a

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Solution for 3/a-7/2a equation: 


D( a )

a = 0

a = 0

a = 0

a in (-oo:0) U (0:+oo)

3/a-((7/2)*a) = 0

(-7/2)*a+3/a = 0

3*a^-1-7/2*a^1 = 0

(3*a^0-7/2*a^2)/(a^1) = 0 // * a^2

a^1*(3*a^0-7/2*a^2) = 0

a^1

(-7/2)*a^2+3 = 0

(-7/2)*a^2+3 = 0

DELTA = 0^2-(3*4*(-7/2))

DELTA = 42

DELTA > 0

a = (42^(1/2)+0)/(2*(-7/2)) or a = (0-42^(1/2))/(2*(-7/2))

a = (42^(1/2))/(-7) or a = (42^(1/2))/7

a in { (42^(1/2))/(-7), (42^(1/2))/7} 

a in { (42^(1/2))/(-7), (42^(1/2))/7 }

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