22*23*24*25................210=2 find n? Share with your friends Share 1 Shubham Chourasiya answered this Here we have to use the property ab×ac = a(b+c)In this case , 22×23×24×25 ...........210 =2(2+3+4 + ... .......10) This is an AP and we have to find the sum Sum = n2(2a + (n-1)d) Here n = 9. You can find this by simple counting a =2 and d =1 Putting the values , we getsum = 92(2×1 + (9-1)×1) = 54 . So 2(2+3+4 + ... .......10) = 254. Hope this would have cleared your doubt . 0 View Full Answer Anjaya answered this 110 0