Write a partial sum for the power series which represents this function consisting of the first 5 nonzero terms. For example, if the series were ∑[infinity]n=03nx2n, you would write 1+3x2+32x4+33x6+34x8. Also indicate the radius of convergence.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.