Question
Class 11MathematicsBinomial Theorem

Find the term containing x10 in the expansion of (2x² − 3/x)11.

Verified Answer

Suppose (r + 1)th term contains x10 in the binomial expansion of (2x² − 3/x)11 when x ≠ 0.

Now, Tr+1 = 11Cr(2x²)11−r(−3/x)r = (−1)r11Cr(2)11−r3rx22−3r

This term will contain x10 if 22 − 3r = 10

⇒ r = 4

So, (4 + 1)th term, i.e., 5th term will contain x10.