r4/7=16

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Solution for r4/7=16 equation: 


r in (-oo:+oo)

(r^4)/7 = 16 // - 16

(r^4)/7-16 = 0

1/7*r^4 = 16 // : 1/7

r^4 = 112

r^4 = 112 // ^ 1/4

abs(r) = 2*7^(1/4)

r = 2*7^(1/4) or r = -(2*7^(1/4))

r in { 2*7^(1/4), -(2*7^(1/4)) }

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