šŸ“¢ Too many exams? Don’t know which one suits you best? Book Your Free Expert šŸ‘‰ call Now!


    Question

    What is the sum of the first 14 terms of an arithmetic

    progression if the first term is -21 and last term is 40?
    A 113 Correct Answer Incorrect Answer
    B 143 Correct Answer Incorrect Answer
    C 133 Correct Answer Incorrect Answer
    D 123 Correct Answer Incorrect Answer

    Solution

    First term of AP = a = - 21 & last term = l = 40 Number of terms = n = 14 Sum of AP = n/2 (a + l) Ā  = 14/2 (- 21 + 40) => 19 x 7 = 133

    Practice Next
    ask-question

    Not sure which exam is best for you Talk to our expert

    Get My Free Call