Is the equation [tex]-2(4-x)=2x+8[/tex] an identity? explain your reasoning.
a. yes, because...
Mathematics, 27.08.2019 00:30 Bloom247
Is the equation an identity? explain your reasoning.
a. yes, because solving the equation gives a statement that is never true.
b. yes, because solving the equation gives a statement that is always true.
c. no, because solving the equation gives a statement that is never true.
d. no, because solving the equation gives a statement that is always true.
i don't know what an identity is or how to explain
Answers: 2
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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 22:00
Identify the expression equivalent to 4(x + x + 7) ā 2x + 8 ā 4 by substituting x = 1 and x = 2.
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