Q. Find the derivative of the following function.y=6−9x5Answer: y′=
Identify Function & Rule: Identify the function and the type of differentiation rule to apply.We have the function y=6−9x5. To find the derivative, we need to apply the chain rule because the function is a composition of functions: an exponential function with a base other than 'e' and a power function.
Rewrite Using Exponential: Rewrite the function using the natural exponential function for easier differentiation.We can rewrite the function as y=eln(6)∗(−9x5) because ab=eln(a)∗b for any positive a and real number b.
Apply Chain Rule: Differentiate the function using the chain rule.The derivative of y with respect to x is y′=dxd[e(ln(6)∗(−9x5))].Using the chain rule, we get y′=e(ln(6)∗(−9x5))∗dxd[ln(6)∗(−9x5)].
Differentiate Exponent: Differentiate the exponent ln(6)⋅(−9x5). The derivative of ln(6)⋅(−9x5) with respect to x is ln(6)⋅dxd[−9x5]. Since ln(6) is a constant, it remains as is, and the derivative of −9x5 is −45x4. So, we have y′=eln(6)⋅(−9x5)⋅ln(6)⋅(−45x4).
Simplify Derivative: Simplify the derivative.We can now simplify the expression by substituting back the original base of the exponential:y′=6−9x5⋅ln(6)⋅(−45x4).
Check for Errors: Check for any mathematical errors. Review the differentiation steps to ensure that the chain rule was applied correctly and that the simplification steps are accurate.
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