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Joseph A.

San Mateo, CA (94409)

20 miles
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\$30.00

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Joseph's Resources

Using the formula where a0 is the initial value and an is the 'nth' term, while 'd' is the common difference:   a7 = a0 + (n-1) x d = 6 + (7-1) * x 6 = 6 + 36 = 42   QED

Using implicit differentiation:   x^-2 + y^-2 = cos(3x) - sin(3x) -2x^-3 (dx/dx) + -2y^-3 (dy/dx) = -3sin(3x)(dx/dx) - 3cos(3x)(dx/dx) crossing out dx/dx (which simplifies to 1) and isolating the dy/dx term: -2y^-3 (dy/dx) = -3sin3x - 3cos3x + 2x^-3 finally...

The quadratic formula assumes you have a quadratic equation equal to zero.  In general:  ax^2 + bx + c = 0. In this case, 7x^2 + 123x - 4 = 0, so a = 7, b = 123, and c = -4 (c is negative because the standard form assumes a, b, and c are positive).     Now,...

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