If nP2=90,then what is the value of n?
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Answered by
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NP2 = 90
NP2 means N(N-1) N(N-1) = 90 N(N-1) = 90 N(N-1) = 90 N2 - N = 90 N2 - N - 90 = 0 (N-10)(N+9) = 0 N-10=0; N+9=0 N=10; N=-9 Ingnore negative answer. Check: 10P2 = 10(9) = 90
NP2 means N(N-1) N(N-1) = 90 N(N-1) = 90 N(N-1) = 90 N2 - N = 90 N2 - N - 90 = 0 (N-10)(N+9) = 0 N-10=0; N+9=0 N=10; N=-9 Ingnore negative answer. Check: 10P2 = 10(9) = 90
Answered by
1
np2 = 90
np= 90 / 2
np = 45
hope this will help you. ....q
np= 90 / 2
np = 45
hope this will help you. ....q
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