an = a+(n-1)d Where an=last term a=first term d=common difference n=number of term Note: last term is denoted by an or l Sn=n/2[2a+(n-1)d Sn=sum of all terms
We all know the prime numbers. Any number which is only divisible by '1' is called a prime number. Do you know what is coprime? First of all, it is a relative term, i.e. we can't say any number coprime...