MCQ
Consider the differential equation $\frac{\text{dy}}{\text{dx}}=\cos\text{x}$ Then we observe that:
- A$\text{y}=\sin\text{x}$
- B$\text{y}=\sin\text{x}+2$
- C$\text{y}=\sin\text{x}-\frac{1}{2}$
- D$\text{y}=\sin\text{x}+\text{c}$
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The vertex of the parabola y2 - 4y - x + 3 = 0 is:
Let x1, x2, ... xn be n observations. Let wi = lxi + k for i = 1, 2, ... n, where l and k are constants. If the mean of xi’s is 48 and their standard deviation is 12, the mean of wi’s is 55 and standard deviation of wi's is 15, the values of l and k should be: