Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Binomial Theorem Binomial Expansion
If the coefficients of (r - 1)th, rth, (r + 1)th terms in the expansion of (1 + x)n are in the ratio 1: 3: 5. Find r and n ?
1
n = 8 and r = 3
2
n = 8 and r = 5
3
n = 7 and r = 3
4
More than one of the above
5
None of the above