Register
Can some one help me to solve this QN.
115k views
2 votes
Can some one help me to solve this QN.

Can some one help me to solve this QN.-example-1
User Emoun
by
5.7k points

1 Answer

1 vote

Answer:

n = 4

Explanation:

3ⁿ⁺¹ - 3ⁿ⁻¹ = 216 Separate exponents

3ⁿ×3¹ - 3ⁿ×3⁻¹ = 216 Factor

3ⁿ(3 – ⅓) = 216

3ⁿ(8/3) = 216 Multiply each side by 3/8

3ⁿ = 81 Factor 81

3ⁿ = 3⁴ Compare exponents

n = 4

=====

Check:

3⁵ - 3³ = 216

243 – 27 = 216

216 = 216

User Vkubicki
by
5.8k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

6.5m questions

8.7m answers

Other Questions

What is the least common denominator of the four fractions 20 7/10 20 3/4 18 9/10 20 18/25
What is 0.12 expressed as a fraction in simplest form
Solve using square root or factoring method plz help!!!!.....must click on pic to see the whole problem
What is the initial value and what does it represent? $4, the cost per item $4, the cost of the catalog $6, the cost per item $6, the cost of the catalog?
What is distributive property ?
Link Copied!