Question

(furgs rs) o valor da expressão A = 2^n+3 + 2^n+2 - 2^n-1 / 2^n-2 +2^n é:

Answer 1

2^n.2³+2^n.2²-2^n.2-¹/2^n.2-²+2^n=

2^n(2³+2²-2-¹)/2^n(2-²+1)=

8+4-1/2/ 1/4+1=

23/2:5/4=

23/2.4/5=

46/5