If the 4 th term in the expansion of x 2 - 2 y 3 6 is - 20 , then x y =

Question

If the 4 th term in the expansion of x 2 - 2 y 3 6 is - 20 , then x y =, 2, 3, 8, 27

MARKS App · Accepted Answer

Given, The 4 th term in the expansion of x 2 - 2 y 3 6 is - 20 , So, T 4 = - 1 3 × C 3 6 x 2 3 × 2 y 3 3 ⇒ - 20 = - 20 x 2 3 × 2 y 3 3 ⇒ x 3 8 × 8 y 3 27 = 1 ⇒ x 3 × y 3 = 27 ⇒ x y = 3

Search any question & find its solution

Looking for more such questions to practice?