If coefficient of (3r + 2)th term and 2rth term in (1 + x)25 is equal then r is equal - Maths - Binomial Theorem

Question

If coefficient of (3r + 2)th term and 2rth term in (1 + x)25 is
equal then r is equal to​

Neha Sethi · Accepted Answer

Dear student

It is given that 25C3r+2=25C2r⇒3r+2=2r or 25=3r+2+2r    ∵nCr=nCs⇒r=s or r+s=n⇒r=-2   (not possible)  or 25=5r+2 5r=23 r=235  (not possible) So please recheck your question as r cannot be in fraction
Regards

If coefficient of (3r + 2)th term and 2rth term in (1 + x)25 is equal then r is equal to​

If coefficient of (3r + 2)th term and 2rth term in (1 + x)25 is equal then r is equal to