If the A.M. and G.M. of two positive numbers are 10 and 8, the numbers are:
A2 and 18
B4 and 16
C6 and 14
D5 and 15
Answer & Solution
Correct answer: B. 4 and 16
a+b = 20, ab = 64; roots of x²−20x+64=0 are 4 and 16.
Related questions
Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE For [[1,2],[2,4]], the determinant equals:If A is invertible, |A^{−1}| equals:For a 3 × 3 non-singular A with |A| = 5, the value of |adj A| is:For a non-singular square matrix A of order n, |adj A| equals:For non-singular A, B of the same order, (AB)^{−1} equals:For a non-singular A, (A^{−1})^{−1} equals: