20/a=a/14

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Solution for 20/a=a/14 equation: 


D( a )

a = 0

a = 0

a = 0

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

20/a = a/14 // - a/14

20/a-(a/14) = 0

20*a^-1-1/14*a^1 = 0

(20*a^0-1/14*a^2)/(a^1) = 0 // * a^2

a^1*(20*a^0-1/14*a^2) = 0

a^1

(-1/14)*a^2+20 = 0

(-1/14)*a^2+20 = 0

DELTA = 0^2-(4*20*(-1/14))

DELTA = 40/7

DELTA > 0

a = ((40/7)^(1/2)+0)/(2*(-1/14)) or a = (0-(40/7)^(1/2))/(2*(-1/14))

a = -7*(40/7)^(1/2) or a = 7*(40/7)^(1/2)

a in { -7*(40/7)^(1/2), 7*(40/7)^(1/2)} 

a in { -7*(40/7)^(1/2), 7*(40/7)^(1/2) }

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