Asked by Z32
What is the derivative of f(x)=5^x log6(x)?
Answers
Answered by
MathMate
Exponential rule:
d(a^x)/dx = ln(a) a^x
For logarithms to arbitrary base:
d(log<sub>a</sub>(x))/dx
=d(ln(x)/ln(a))/dx
=ln(a)/x
Finally, the product rule:
d(uv)/dx = u dv/dx + v du/dx
set
u=5^x,
v=log<sub>6</sub>(x)
=ln(x)/ln(6)
Can you take it from here?
d(a^x)/dx = ln(a) a^x
For logarithms to arbitrary base:
d(log<sub>a</sub>(x))/dx
=d(ln(x)/ln(a))/dx
=ln(a)/x
Finally, the product rule:
d(uv)/dx = u dv/dx + v du/dx
set
u=5^x,
v=log<sub>6</sub>(x)
=ln(x)/ln(6)
Can you take it from here?
Answered by
MathMate
For logarithms to arbitrary base:
d(log<sub>a</sub>(x))/dx
=d(ln(x)/ln(a))/dx
=1/(ln(a)*x)
d(log<sub>a</sub>(x))/dx
=d(ln(x)/ln(a))/dx
=1/(ln(a)*x)
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