Given that the first and forth terms of G.P are 6 and 162...
Given that the first and forth terms of G.P are 6 and 162 respectively, find the sum of the first three terms of the progression
27
8
78
48
Correct answer is C
a=6,U4=162U4=ar4−1U4=ar3162=6(r)3r3=27r=3√27r=3S4=a(rn−1)r−1=6(33−1)3−1=6(27−1)2=3×26=78
Find the number of ways that the letters of the word EXCELLENCE be arranged ...
Solve the inequality x2 + 2x > 15....
If y2+ 14y + k is a perfect square, then k =...
Find the length of a side of a rhombus whose diagonals are 6cm and 8cm ...
A chord of a circle subtends an angle of 120° degrees at the centre of a circle of diameter...
The inverse of matrix N = |2314| is...
Find the value of x at the minimum point of the curve y = x3 + x2 - x + 1 ...