If the midpoint of the line joining (1 - k, -4) and (2, k...
If the midpoint of the line joining (1 - k, -4) and (2, k + 1) is (-k, k), find the value of k.
-4
-3
-2
-1
Correct answer is D
Midpoint between (x1,y1) and (x2,y2) = (x1+x22,y1+y22).
(−k,k)=(2+(1+k)2,−4+(k+1)2)
−k=k+32⟹−2k=k+3
−3k=3⟹k=−1
Find the equation of a circle with centre (2, -3) and radius 2 units. ...
If α and β are roots of x2 + mx - n = 0, where m and n are constants, form the ...
If →PQ = -2i + 5j and →RQ = -i - 7j, find →PR ...
If f(x)=mx2−6x−3 and f′(1)=12, find the value of the constant m....
For what range of values of x is x2 - 2x - 3 ≤ 0...
If 6x+k2x2+7x−15 = 4x+5−22x−3. Find the value ...
Given that P = {x : 2 ≤ x ≤ 8} and Q = {x : 4 < x ≤ 12} are subsets of the universal set...
Determine the coefficient of x2 in the expansion of (a+3x)6...