Question

m*n=m+(m-1)+(m-2)+... evaluate 7*5

Answer 1

Given

m*n = m + (m-1 )....+ (m-n)

So, Now

7 * 5 = 7 + (7-1 )+ (7-2)+(7-3)+(7-4)+(7-5)

7 *5 = 7 + 6 + 5 + 4 + 3 + 2

7 * 5 = 27 .

Hope helped!