Question

Calculati $(-1)^{n+7}$ x (-15) + $(-1)^{5n+2}$ x (+43) , n c N

Am nevoie urgent de raspuns.
dau coroana

Answer 1

daca n este nr par:
(-1) × (-15)+1=15+1=16

daca n est numar impar:

1×(-15)-1= -15-1 = -16