The term in the expansion:
T ( k+1) = n C k * A^(n-k) * B^k.
In this case: n = 11, k + 1 = 8, so k = 7.
A = x, B = - 3 y
T 8 = 11 C 7 * x^(11-7) * ( - 3 y )^7 =
=( 11 *10 * 9 * 8 * 7 * 6 * 5 ) / ( 7 * 6 * 5 * 4 * 3 * 2 * 1 )* x^4 * ( - 2,187 y^7 ) =
= 330 * ( - 2,187 ) x^4 y^7 = - 721,710 x^4 y^7
Answer: The 8th term in expansion is
Answer:
5
/y^3
Step-by-step explanation:
The area of a cube is A= 6L^2. A=surface area, L= edge length
The total area is 6(2L^2) ---> 12L^2. Because when we place the 8 cubes (use 4 cubes to make a square then stack another 4 cube square) to form the original, the small cube's edge (length) is doubled.
Hello,
We suppose 2x-1≠0 or x≠1/2
