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\( a^{b}\)

\( a_{b}^{c}\)

\({a_{b}}^{c}\)

\(a_{b}\)

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Grad of 3y = 4x - 1

y = 4x/3 - 1/3

Grad = 4/3

Grad of Ky = x + 3

y = x/k + 3/4

Grad = 1/k

Since two lines are perpendicular,

1/k = -3/4

-3k = 4

k = -4/3