Question

if the binomial expension of
$(m - nx) 3 \: is1 + 9x...find \: the \: value \: of \: m$

Answer 1

Ans.

Here,
3(m-nx) = 1+9x
or, 3m - 3nx = 1 + 9x

Now comparing among the coefficients, we get
3m = 1
or, m = 1/3

I HOPE THAT THIS HELPS YOU.

Answer 2

Here,
3(m-nx) = 1+9x
or, 3m - 3nx = 1 + 9x

Now comparing among the coefficients, we get
3m = 1
or, m = 1/3

x+y)n = xn + nC1xn-1y+nC2xn-2y2+-----+nCrxn-ryr+ -------+---------+nCn-1xyn-1   + ncnyn u can use this formulae