EquationDate: 04/13/97 at 17:23:14 From: Nikita Bacchus Subject: Equation Hi Dr. Math, Solve for x in the following equation: a) 4 4^(2x+4)-4 = e b) arcsin (x+Pi/2) = 3Pi/2. In the first one, you would use natural logs, right? Second I'm not sure. Nikita Date: 04/14/97 at 10:20:03 From: Doctor Anthony Subject: Re: Equation > a) 4 4^(2x+4)-4 = e 4^(2x+4) = (e+4)/4 (2x+4)ln(4) = ln[(e+4)/4] 2x+4 = ln[(e+4)/4)]/ln(4) = 0.37405 2x = -3.62595 x = -1.812977. > b) arcsin (x+Pi/2)=3Pi/2 sin^(-1)(x+pi/2) = 3pi/2 x+pi/2 = sin(3pi/2) = -1 x = -pi/2 -1 = -2.570796. -Doctor Anthony, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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