RU Admission Test 2016-2017 (Unit-C, G-Odd)

1. If $A=\left[\begin{array}{ll}3 & 1 \\ 9 & 3\end{array}\right]$ then what is the inverse of $A$ ?

2. A rock thrown horizontal to ground at 49 m/s velocity from the top of a hill falls on the ground at 490m of train = v m/s then, tan60° = 30 ⇒√3 = ⇒v= = 30√3 m/s 30 away from the hill. What is the height of the hill? (g=9.8 m/s²)

3. Which compound is more likely to give nitration reaction?

4. What condition is required for one root of the equation $a x^{2}$ + bx + c = 0 to be zero?

5. Rod cell of human eye -