Consider the statements: p it is hot, q: it is raining
Which of the following symbols correctly represents the statement "It is raining if and only if it it is cold"?
p ⟺ ∼q
p ⟺ q
∼p ⟺ ∼q
q ⟺ ∼p
Correct answer is D
No explanation has been provided for this answer.
Make x the subject of the relation d = √6x−y2
x = 6+12d2+y
x = 12d2−y
x = 12y−2d2
x = 122d2+y
Correct answer is D
d = √6x−y2
d2=6x−y2
2xd2=12−xy
2xd2+xy=12
x = 122d2+y
The roots of a quadratic equation are −12 and 23. Find the equation.
6x2−x+2=0
6x2−x−2=0
6x2+x−2=0
6x2+x+2=0
Correct answer is B
(x + 12) (n - 23)
x2−23x+x2−13
6x2−4n+3n−2=0
6x2−x−2=0
Find the 6th term of the sequence 23715415,...
-13
-15
-115
19
Correct answer is A
a = 23, d = 715 - 23
= 7 - 10
= −315
d = - −15
T6 = a + 5d
= 23 + 5(−15
= 23 - 1
= 2−33
= −13
Simplify the expression a2b4−b2a4ab(a+b)
a2−b2
b2−a2
a2b−ab2
ab2−a2b
Correct answer is D
a2b4−b2a4ab(a+b) = a2b24(b2−a2ab(a+b)
= ab[(b−a)(b+a)]a+b
= ab(b - a)
= ab2−a2b