If AX) = x2 + 2x + 3, what is the average rate of change of AX) over the interval (-4, 6]? OA 51 B. 40 OC. 31 OD 20 OE 4​

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If AX) = x2 + 2x + 3, what is the average rate of change of AX) over the interval (-4, 6]? OA 51 B. 40 OC. 31 OD 20 OE 4​

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Farah 4 years 2021-08-26T20:40:39+00:00 1 Answers 6 views 0

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  1. Latifah
    0
    2021-08-26T20:41:39+00:00
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    Answer:

    E

    Step-by-step explanation:

    The average rate of change of A(x) in the closed interval [ a, b ] is

    \frac{f(b)-f(a)}{b-a}

    Here [ a, b ] = [ – 4, 6 ] , then

    f(b) = f(6) = 6² + 2(6) + 3 = 36 + 12 + 3 = 51

    f(a) = f(- 4) = (- 4)² + 2(- 4) + 3 = 16 – 8 + 3 = 11 , thus

    average rate of change = \frac{51-11}{6-(-4)} = \frac{40}{10} = 4 → E

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )