How to solve for x ?

Related questions

• How can an infinite series have a finite sum?
• How do you evaluate an infinite series?
• How do you find the sum of an infinite series?
• How does an infinite geometric series apply to being pushed on a swing?
• What are infinite series used for?
• What is a convergent infinite series?
• What is a divergent infinite series?
• What is a partial sum of an infinite series?
• What is an oscillating infinite series?
• What is a telescoping infinite series?