Question

please reply me fast ,express 81 as the sum of a product of prime number and 1​

Answer 1

Answer:

We know that,

Sum of first n odd numbers = n2

Expressing 81 as a sum of 9 odd numbers

81 = (9)2

n = 9

81 = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17

hope uh understand!!!

Step-by-step explanation:

Answer 2

Answer:

what is this I need an explanation