Q. In which expression is the coefficient of the n term −1 ?(A) 3n2−4n−1(B) −n2+5n+4(C) −2n2−n+5(D) 4n2+n−5
Identify Coefficient n Term Option A: Identify the coefficient of the n term in option (A) 3n2−4n−1.The coefficient of the n term in this expression is −4.
Check Coefficient n Term Option A: Check if the coefficient of the n term in option (A) is −1. The coefficient of the n term in option (A) is −4, not −1.
Identify Coefficient n Term Option B: Identify the coefficient of the n term in option (B) −n2+5n+4.The coefficient of the n term in this expression is 5.
Check Coefficient n Term Option B: Check if the coefficient of the n term in option (B) is −1. The coefficient of the n term in option (B) is 5, not −1.
Identify Coefficient n Term Option C: Identify the coefficient of the n term in option (C) −2n2−n+5. The coefficient of the n term in this expression is −1.
Check Coefficient n Term Option C: Check if the coefficient of the n term in option (C) is −1. The coefficient of the n term in option (C) is indeed −1.
Skip Checking Option D: Since we have found the expression with the coefficient of the n term as −1, there is no need to check option (D).
More problems from Pascal's triangle and the Binomial Theorem