Question

without actual addition ,find the sum of the following ,a )1+3+5+7+9+11 b)1+3+5+7+9+11+13+15+17

please answer quickly​

Answer 1

Answer:

this is correct ans. as it was use in the square nd square root or cube nd cube root (ques. from rs aggarwal. I have answer only 1 part try other part yourself. if it will not by you . Then i will answer that