Question

calcule as expressões numérica
a) 6^1×3^-2+4^1-4×7^0

b) (3/5)^-2×3^4×5^-2

Answer 1

a)6¹•3^-²+4¹-4•7^0
6•-9+4-4
-54+4-4
-50-4
-54

b)(3/5)^-²•3⁴•5^-²
3•3=9
5•5=25

9/25•81•25
0,36•81•25
29,16•25
729

Espero ter ajudado