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Verdich [7]
3 years ago
10

Substitute and solve; 7(5f - 3n) -8 when n = 3 and f = 7

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
7 0

Answer:

174

Step-by-step explanation:

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y'  =  (cosx + sinx)( -sinx - cosx) - (cosx - sinx)(-sinx + cosx)

        ---------------------------------------------------------------------------

                                 (cosx + sinx)^2

=  -sinxcosx - cos^2x - sin^2x - sinxcosx - (-sinxcosx+cos^2x+sin^2x-sinxcosx

       -------------------------------------------------------------------------------------------------------

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=       - 2 / (cos x + sinx)^2.

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