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Combining like terms $z$ and $z$
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$derivdef\left(2z+6\right)$
Learn how to solve definition of derivative problems step by step online. Find the derivative of z+z+6 using the definition. Combining like terms z and z. Find the derivative of 2z+6 using the definition. Apply the definition of the derivative: \displaystyle f'(x)=\lim_{h\to0}\frac{f(x+h)-f(x)}{h}. The function f(x) is the function we want to differentiate, which is 2z+6. Substituting f(x+h) and f(x) on the limit, we get. Multiply the single term 2 by each term of the polynomial \left(z+h\right). Multiply the single term -1 by each term of the polynomial \left(2z+6\right).