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Calculate dy dx\frac { \mathrm { d } y } { \mathrm {~d} x }

Question 94

Multiple Choice

Calculate dy dx\frac { \mathrm { d } y } { \mathrm {~d} x } . You need not expand your answer. y=4.2x0.80.6x0.50.4+x0.1y = \frac { 4.2 x ^ { - 0.8 } - 0.6 x ^ { - 0.5 } } { 0.4 + x ^ { 0.1 } }


A) (3.36x1.8+0.3x1.5) (0.4+x0.1) +0.1x0.9(4.2x0.80.6x0.5) (0.4+x0.1) 2\frac { \left( - 3.36 x ^ { - 1.8 } + 0.3 x ^ { - 1.5 } \right) \left( 0.4 + x ^ { 0.1 } \right) + 0.1 x ^ { - 0.9 } \left( 4.2 x ^ { 0.8 } - 0.6 x ^ { 0.5 } \right) } { \left( 0.4 + x ^ { 0.1 } \right) ^ { 2 } }
B) 3.36x1.8+0.3x1.50.4+x0.1\frac { - 3.36 x ^ { - 1.8 } + 0.3 x ^ { - 1.5 } } { 0.4 + x ^ { 0.1 } }
C) (3.36x1.8+0.3x1.5) (0.4+x0.1) 0.1x0.9(4.2x0.80.6x0.5) (0.1x0.9) 2\frac { \left( - 3.36 x ^ { - 1.8 } + 0.3 x ^ { - 1.5 } \right) \left( 0.4 + x ^ { 0.1 } \right) - 0.1 x ^ { - 0.9 } \left( 4.2 x ^ { - 0.8 } - 0.6 x ^ { - 0.5 } \right) } { \left( 0.1 x ^ { - 0.9 } \right) ^ { 2 } }
D) (3.36x1.8+0.3x1.5) (0.4+x0.1) 0.1x0.9(4.2x0.80.6x0.5) (0.4+x0.1) 2\frac { \left( - 3.36 x ^ { - 1.8 } + 0.3 x ^ { - 1.5 } \right) \left( 0.4 + x ^ { 0.1 } \right) - 0.1 x ^ { - 0.9 } \left( 4.2 x ^ { - 0.8 } - 0.6 x ^ { - 0.5 } \right) } { \left( 0.4 + x ^ { 0.1 } \right) ^ { 2 } }
E) (3.36x1.8+0.3x1.5) (0.4+x0.1) 0.1x0.9(4.2x0.80.6x0.5) 0.4+x0.1\frac { \left( - 3.36 x ^ { - 1.8 } + 0.3 x ^ { - 1.5 } \right) \left( 0.4 + x ^ { 0.1 } \right) - 0.1 x ^ { - 0.9 } \left( 4.2 x ^ { 0.8 } - 0.6 x ^ { 0.5 } \right) } { 0.4 + x ^ { 0.1 } }

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