An equation is an mathematical expression where two things are equal. In this case we have a number and an product. The problem states that 20 is 4 times as many as 5. The "is" word gives us a hint that there is the equal sign, and the "times" gives us a hint that it is a product. So we can express this with:
In your question that first im confused but i arrange if correctly though, in my calculation the possible power of the series is infinity <span>∑ n-0 times the -1 one to the power of n over n+1 times x to the power of n+2</span>
A method to solve it would be would be: First converting 5% to a decimal then multiplying that by 15.80 in order the find 5 percent of 15.80...Afterwards you have to add that value to the original 15.80 ..And you should end up with the same answer.