Question

Simplifique pra mim

Answer 1

(n+2)!/n!

(n+2)(n+1)n!/n!

(n+2)(n+1)

n²+n+2n+2
n²+3n+2=0

delta
b²-4ac
9-4.1.2
9-8
1

x=-b +/- Vdelta /2a
x=-3 +/- 1 /2

x'=-3 + 1 /2
x'=-2/2
x'=-1

x"=-3-1 /2
x"=-4/2
x"=-2

bons estudos