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y = 4x^3 - 5/x^2 find dy/dx

First rewrite the equation into an easier form:y = y = 4x^3 - 5x^-2dy/dx means differentiate y with respect to xSo when differentiating, you look at the first term and write the co-efficient of the x term ( ...
DA
Answered by Dennis A. • Maths tutor
3715 Views

How do I solve inequalities when they're not linear?

Ok, let's talk about quadratic inequalities in particular. Look at the inequality x^2 - 8x + 15 > 0.What does a solution to this mean? It means the curve x^2 - 8x + 15 > 0 is above the x-axis at this p...
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Answered by Damon F. • Maths tutor
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Solve the simultaneous equation: (16^x)/(8^y)=1/4 and (4^x)(2^y)=16

This solution requires you to use your knowledge of power extensively. The final must be shown with a lot of working out, the solution is x=1 and y=2.
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Answered by SYED A. • Maths tutor
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Solve this simultaneous equation: 3x + y = 10, x + y = 4

x = 3
HM
Answered by Hibah M. • Maths tutor
3233 Views

Solve this simultaneous equation for x: 3x + y = 10, x + y = 4

x = 3
HM
Answered by Hibah M. • Maths tutor
4077 Views