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Q. 3

Expert-verified
Calculus
Found in: Page 324
Calculus

Calculus

Book edition 1st
Author(s) Peter Kohn, Laura Taalman
Pages 1155 pages
ISBN 9781429241861

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Short Answer

Sum and constant-multiple rules: State the sum and constant-multiple rules for (a) derivatives and (b) limits.

(a) The sum rule for derivatives states that the derivative of a sum is equal to the sum of the derivatives.

Sum rule of derivatives:

ddx[f(x)+g(x)]=ddxf(x)+ddxg(x)

The Constant multiple rule says the derivative of a constant multiplied by a function is the constant multiplied by the derivative of the function.

Constant multiple rule:

ddx[k·f(x)]=k·ddxf(x)

(b) Sum law for limits states that the limit of the sum of two functions equals to the sum of the limits of two functions.

Sum rule of limit:

limxc[f(x)+g(x)]=limxcf(x)+limxcg(x)

Constant multiple law for limits states that the limit of a constant multiple of a function equals the product of the constant with the limit of the function.

Constant multiple of limit:

limxc[k·f(x)]=k·limxcf(x)

See the step by step solution

Step by Step Solution

Step 1. Given Information:

We want to State the sum and constant-multiple rules for

  • (a) derivatives
  • (b) limits.

Part (a) Step 1. Solution of (a):

The sum rule for derivatives states that the derivative of a sum is equal to the sum of the derivatives.

Sum rule:

ddx[f(x)+g(x)]=ddxf(x)+ddxg(x)

The Constant multiple rule says the derivative of a constant multiplied by a function is the constant multiplied by the derivative of the function.

Constant multiple rule:

ddx[k·f(x)]=k·ddxf(x)

Part (b) Step 1. Solution:

Sum law for limits states that the limit of the sum of two functions equals to the sum of the limits of two functions.

Sum Law:

ddx[f(x)+g(x)]=ddxf(x)+ddxg(x)

Constant multiple law for limits states that the limit of a constant multiple of a function equals the product of the constant with the limit of the function.

Constant multiple law:

limxc[k·f(x)]=k·limxcf(x)

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