Question

Find the value of n if
n +1 P3 =nP4​

Answer 1

$\huge\tt{AnsweR}$

According to question need to find the value of n if n +1 P3 =nP4

$\sf = n + 1p {}^{3} = np {}^{4} \\ \sf = p {}^{3} = np {}^{4} - n \\ \sf = p3 - np {}^{4} = - n \\ \sf = n =np {}^{4} - p \\ \sf = n = p {}^{3} (np - 1)$