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Mathematics, 21.06.2019 13:30
Ily begins solving the equation 4(x ā 1) ā x = 3(x + 5) ā 11. her work is shown below. 4(x ā 1) ā x = 3(x + 5) ā 11 4x ā 4 ā x = 3x + 15 ā 11 3x ā 4 = 3x + 4 how can her partial solution be interpreted?
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Mathematics, 21.06.2019 19:10
Which graph represents the function g(x) = |x + 4| + 2?
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) ā sinh2(x) = 1 and (b) 1 ā tanh 2(x) = sech 2(x). solution (a) cosh2(x) ā sinh2(x) = ex + eāx 2 2 ā 2 = e2x + 2 + eā2x 4 ā = 4 = . (b) we start with the identity proved in part (a): cosh2(x) ā sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 ā sinh2(x) cosh2(x) = 1 or 1 ā tanh 2(x) = .
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Mathematics, 21.06.2019 20:00
Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0
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