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Chapter 1: Q. 310 - Exercises (page 77)

In the following question, evaluate the expression.

18-4nwhen (a)n=3(b)n=-3.

Short Answer

Expert verified

(a) 6when n=3

(b) 30whenn=-3

Step by step solution

01

Step 1. Given information .

Consider the given expression18-4nwhen (a)n=3 (b)n=-3鈬�18-4n鈬�18-4脳3鈬�18-12鈬�6鈬�18-4n鈬�18-4脳3鈬�18-12鈬�6

02

Step 2. (a) Simplify the expression 18-4n when n=3.

Substitute the value of n in the given expression .

鈬�18-4n鈬�18-4脳3鈬�18-12鈬�6

The value of expression for n=3is 6.

03

Step 3. (b) Simplify the expression 18-4n when n=-3.

Substitute the value of n in the given expression .

鈬�18-4n鈬�18-4脳-3鈬�18+12鈬�30

The value of given expression for n=-3is 30.

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