ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!


    Question

    For which range of 'p' does the expression 19p - 2p┬▓-

    35 have a positive value??
    A 2.5 > p > 7 Correct Answer Incorrect Answer
    B 2.5 тЙд p тЙд 7 Correct Answer Incorrect Answer
    C 2.5 = p = 7 Correct Answer Incorrect Answer
    D 2.5 < p < 7 Correct Answer Incorrect Answer

    Solution

    ATQ: So, 19p - 2p┬▓- 35 > 0 Or, 2p┬▓- 19p + 35 < 0 Or, 2p┬▓- 14p - 5p + 35 < 0 Or, 2p(p - 7) - 5(p - 7) < 0 Or, (2p - 5) (p - 7) < 0 So, p = 2.5 or p = 7 For any value of 'p' > 7, the value of expression 2p┬▓- 19p + 35 becomes, positive. So, 'p' lies between 2.5 and 7.

    Practice Next
    More No. System Questions
    ask-question