Identify Function: Identify the function to differentiate.The function given is 49x−9.
Rewrite Function: Rewrite the function in a form that is easier to differentiate.The square root of a number is the same as raising that number to the power of 1/2. So, 49x−9 can be written as (49x−9)1/2.
Apply Chain Rule: Apply the chain rule for differentiation. The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. In this case, the outer function is u(1/2) and the inner function is 49x−9.
Differentiate Outer Function: Differentiate the outer function with respect to the inner function.The derivative of u(1/2) with respect to u is (1/2)u(−1/2).
Differentiate Inner Function: Differentiate the inner function with respect to x. The derivative of 49x−9 with respect to x is −9×49x−10.
Combine Derivatives: Combine the derivatives using the chain rule.The combined derivative is (21)(49x−9)−21∗(−9⋅49x−10).
Simplify Expression: Simplify the expression.First, simplify (49x−9)−21 to (49−21x29). Then, multiply this by −9×49x−10.
Further Simplify Expression: Further simplify the expression.Since 49(−1/2) is the same as 1/49 or 1/7, the expression becomes (1/7)x(9/2)∗(−9×49x(−10)).
Multiply Constants and Combine Terms: Multiply the constants and combine the x terms.The constants are (71)×(−9)×49. The x terms are x(29)×x(−10), which simplifies to x(−211).
Complete Simplification: Complete the simplification.The constants (71)×(−9)×49 simplify to −63. The final expression is −63x(−211).