Question

Aratati ca urmatoarele numere sunt patrate perfecte: a) 49^15=(7^2)^5=(7^15)^2

b)57^12

c)(3^21+3^20+3^10):39

d) (4^50+4^49+4^48):21

care puteti sa ma ajutati va rog !!!!@

Answer 1

a) 49^15=49×49^14=7^2×(49^7)^2=(7×49^7)^2

b) 57^12=(57^2)^6=(57^6)^2

c) = [3^19 (3^2+3+1)]÷39=(3^19×13):39=(3^18×3×13)÷39=(3^18×39)÷39=3^18=(3^2)^9=(3^9)^2

d) =[4^48 (4^2+4+1)]÷21=(4^48×21)÷21=4^48=(4^2)^24=(4^24)^2