Question

Sendo
A=1/3+(-1/5) B= (-2/5)-(-1/3) C= (-4/5)+(2/7)


Determine o valor de:
a) A
b) B
c) C
d) A+B+C
e) A-B-C

Answer 1

a)1/3+(-1/5) = 1/3-1/5= 2/15
b)(-2/5)-(-1/3) = -2/5+1/3 = -1/15
c)(-4/5)+(2/7) =-4/5+2/7 = -18/35
d)2/15(-1/15)+(-18/35) = 2/15-1/15-18/35 = 1/15-18/35 = 47/105
e)2/15-(-1/15)-(-18/35) = 2/15+1/15+18/35 = 3/15+18/35 = 75/105
obs : para encontrar a resposta fiz por mmc...
espero ter ajudado :-)