10/(9r)+10/(7r)

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Solution for 10/(9r)+10/(7r) equation: 


D( r )

7*r = 0

9*r = 0

7*r = 0

7*r = 0

7*r = 0 // : 7

r = 0

9*r = 0

9*r = 0

9*r = 0 // : 9

r = 0

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

10/(9*r)+10/(7*r) = 0

160/63*r^-1 = 0 // : 160/63

r^-1 = 0

r naleu017Cy do O

r belongs to the empty set

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