3
9
27
81
Correct answer is B
9∗3n+1−3n+23n+1−3n
= 3n∗3n∗31∗−32∗323n∗31−3n
= 3n(32∗31)3n(31−1)
= 27−93−1
= 182
= 9
Resolve 3x−1(x−2)2,x≠2 into partial fractions....
If α and β are the roots of 7x2+12x−4=0,find the value of \(\frac{αβ}...
If the determinant of the matrix (2x35)=13, find...
Find the minimum value of y=x2+6x−12....
Forces 90N and 120N act in the directions 120° and 240° respectively. Find the resultant of ...
Given \sin \theta = \frac{\sqrt{3}}{2}, 0° \leq \theta \leq 90°, find \(\tan 2\the...
Given that AB = \begin{pmatrix} 4 \\ 3 \end{pmatrix} and \(AC = \begin{pmatrix} 2 \\ -3 \end{pma...
Find the radius of the circle 2x^2 + 2y^2 - 4x + 5y + 1 = 0...
A binary operation ♦ is defined on the set R, of real numbers by \(a ♦ b = \fr...
If 3x^2 + p x + 12 = 0 has equal roots, find the values of p ....