Question

If x + 15 = 19, evaluate x^3 - x^-2 + 16x^-1​

Answer 1

67.9375

Explanation:

x+15=19

x=19-15=4

x^3-x^-2+16x^-1 = 4^3-4^-2+16(4)^-1=67.9375

Answer 2

Answer is 67.9

Explanation:

`{ \sf{x + 15 = 19}} \\ { \sf{x = 4}}`

function of x:

`{ \bf{f(x) = {x}^(3) - {x}^( - 2) + 16x {}^( - 1) }} \\ { \sf{f(4) = {4}^(3) - (4) {}^( - 2) + 16(4) {}^( - 1) }} \\ { \sf{f(4) = 67.9}}`