Answer:
If A ⊆ B, then A ⊂ B.
If A = B, then A ⊆ B.
If A = B, then A ⊂ B.
Step-by-step explanation:
In set theory '⊂' is the symbol of proper subset and '⊆' is the symbol of subset of a set.
In option (a),
If A ⊆ B
⇒ A ⊂ B or A = B
Thus, If A ⊆ B, then A ⊂ B.
Option a is true.
(b) If A ⊂ B
⇒ A is the subset of B
That is, all elements of A are also the element of B,
But we can not say A = B
Thus, option b is not true.
(c) If A = B
⇒ A ⊂ B and A ⊃ B or A ⊆ B and B ⊆ A ( Because every set is the subset of itself )
⇒ A ⊆ B.
Option c is true.
(d) If A = B,
⇒ A ⊂ B
Option d is true.
(e) If A ⊂ B,
Then we can not say that,
A = B or A ≠ B
Thus, option e is not correct.
Answer:
f(x)=5(-8)^3+1 = -2559
Step-by-step explanation:
f(-8) means x = -8
You just need to plug -8 into the function f(x) = 5x^3+1
(-8)^3=-512
5*-512=-2560
-2560+1 = -2559
Answer:
x=5 and -5
Step-by-step explanation:
hope this helps
Answer:
it would cost 71 pounds and 2 pence. final cost could be different if you are taxed on the sale
Step-by-step explanation:
.53x134= 71.02
