for Java 1 class, thanks

.... tahi Write a method called method3 that accepts an integer parametern and returns a sum of the first n-1 terms of the sequence. In other words, the method should generate the following sequence to calculate sum: 1 + } + $ + + For example, method4 (2) will return 1.0 since 1 = 1.0 method4 (15) will return 3.251562326562327 , the result from 1 + 1 + t + 1} + /* You may assume that the parameter n is nonnegative. */