18a2
45a4
135a4
1215a2
Correct answer is C
(a+3x)6.
The coefficient of x2 is:
6C4(a)6−2(3x)2=6!(6−4)!4!(a4)(9x2)
15×a4×9=135a4
Find the angle between (5i+3j) and (3i−5j)...
Given that f(x)=5x2−4x+3, find the coordinates of the point where the gradient is 6....
In △PQR, ¯PQ = 5i - 2j and ¯QR = 4i + 3j. Find \(\...
Which of these inequalities is represented by the shaded portion of the graph? ...
Find the derivative of 3√(3x3+1 with respect to x....
A straight line 2x+3y=6, passes through the point (-1,2). Find the equation of the line. ...
If(19)2x−1=(181)2−3xfind the value of x...
The function f:F→R = \(f(x) = \begin{cases} 3x + 2 : x > 4 \\ 3x - 2 : x = 4 \\ ...