Arihant Bansal - 1 year ago 110

Java Question

What will be the algorithm for calculating the given series?

Series to be calculated

Here's what I coded till now:

`public static double sumOfSeries(double x, int numTerms) { // -1 <= x <= 1`

double sum = x;

for(int i = 1; i <= numTerms; i++) {

}

return sum;

}

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Answer Source

try to separate the coefficients from polynomials and calculate those in separate methods. Example:

```
public class NewClass {
public static void main(String[] args) {
int greatestExponent = 9;
double x = 0.5;
System.out.println(calculate(x,greatestExponent));
}
public static double getCoefficient(int n){
double coff = 1;
for(int i=1; i<n; i++){
if(i%2==0){
coff = coff/i; //if even put it in the denominator
}
else{
coff = coff*i; // else numerator
}
}
return coff/n; // at the end divide with the exponent (ex. x^9 /9)
}
public static double calculate(double x, int expo){
double result = 1;
for (int i = 1; i<= expo; i+=2){
result += (getCoefficient(i)*Math.pow(x, i)); //for each odd exponent calculate the cofficient and x^i
}
return result;
}
}
```

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