2
4
5
6
Correct answer is A
\(^{3x}C_{2} = \frac{3x(3x - 1)(3x - 2)!}{(3x - 2)! 2!} = 15\)
\(3x(3x - 1) = 30 \implies 9x^{2} - 3x - 30 = 0\)
\(9x^{2} - 18x + 15x - 30 = 9x(x - 2) + 15(x - 2) = 0\)
\((9x + 15)(x - 2) = 0\)
x = 2.
Find the magnitude and direction of the vector \(p = (5i - 12j)\)...
The fourth term of a geometric sequence is 2 and the sixth term is 8. Find the common ratio. ...
Find the domain of \(g(x) = \frac{4x^{2} - 1}{\sqrt{9x^{2} + 1}}\)...
A fair die is tossed twice. What is its smple size? ...
Evaluate \(\begin{pmatrix} 2 & 3 \\ 4 & 1 \end{pmatrix} \begin{pmatrix} 2 \\ 3 \end{pmatrix}...
If \(\frac{1}{5^{-y}} = 25(5^{4-2y})\), find the value of y....