Hey guys please give me answer
Answers
1)
a) a=-3/5,b=-2/7
a-b=-3/5+2/7
=-21+10/35
=-19/35
b-a=-2/7+3/5
=-10+21/35
=19/35
hence a-b not =b-a
by this method you can solve the remaining problems.
2)
a)a=-2/3,b=5/7,c=-1/6
a-(b-c)=-2/3-(5/7+1/6)
=-2/3-1
=-5/3
(a-b)-c=(-2/3-5/7)+1/6
=-29/21+1/6
=-51/43
a-(b-c)not=(a-b)-c
hence by this method you can solve the remaining problems
Answer:
Step-by-step explanation:
a - b does not equal to b - a
1) a = -3/5 b = - 2/7
a - b = -3/5 + 2/7
a - b = - 21 + 10 /35
a - b = - 11/35
b - a = - 2/7 + 3/5
b - a = - 10 + 21/35
b - a = 11/35
so a - b does not equal to b - 0
2) a= 2/-9 b = 1/3
2/-9 - 1/3 = 1/3 + 2/9
6 - 9/-27 = 9 + 6/27
- 1/9 does not equal to 5/9
so similarly do all the remaining
2) a = - 2/3 ; b = 5/7 ; c = - 1/6
l.h.s = a - (b - c)
b - c = 5/7 + 1/6
b - c = 30 + 7 /42
b - c = 37/42
a - (b - c) = -2/3 - 37/42
a - (b - c) = -28 - 37 /42
a - (b - c) = -65 /42
(a - b) - c =
a - b = -2/3 - 5/7
a - b = - 14 - 15/21
a - b = -29/21
(a - b) - c = - 29/21 + 1/6
(a - b) - c = - 58 + 7/6
(a - b) - c = - 51/6
so a - (b - c) doesn't equal to (a - b) - c
similarly simplify all the questions