t/7-7/t=0

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Solution for t/7-7/t=0 equation: 


D( t )

t = 0

t = 0

t = 0

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

t/7-(7/t) = 0

t/7-7*t^-1 = 0

1/7*t^1-7*t^-1 = 0

(1/7*t^2-7*t^0)/(t^1) = 0 // * t^2

t^1*(1/7*t^2-7*t^0) = 0

t^1

(1/7)*t^2-7 = 0

(1/7)*t^2-7 = 0

DELTA = 0^2-(-7*4*(1/7))

DELTA = 4

DELTA > 0

t = (4^(1/2)+0)/(2*(1/7)) or t = (0-4^(1/2))/(2*(1/7))

t = 7 or t = -7

t in { -7, 7} 

t in { -7, 7 }

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