Questions Day 2

1. Write a program to calculate 1/n!

2. Write a program to calculate xn/n!

3. Write a program to check if n is a factorial number.

4. Write a program to find the largest factorial factor in n.

5. Write a program to multiply a and b using addition. Numbers can be greater than 0, less than 0 or 0.

6. The binomial theorem says that the coefficient nCr of  the rth power of x in the expansion of (x+10)n is nCr=n!/(r!(n-r)!). Write a program to find all coefficients of x for given n.

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📩 Today’s Programming Tip

✅ Java Tip: Use Optional to avoid null pointer exceptions.
Example:
Optional name = Optional.ofNullable(null);
System.out.println(name.orElse("Unknown"));

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