Write an exponential function y = a(b)” whose graph passes through the given points, (-1,2),(2,54)

Question

Write an exponential function y = a(b)” whose graph passes through the given
points,
(-1,2),(2,54)

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Linh Đan 2 months 2021-08-18T06:39:49+00:00 1 Answers 2 views 0

Answers ( )

    0
    2021-08-18T06:41:04+00:00

    Answer:

    y = 6 * 3ˣ

    Step-by-step explanation:

    y = a * bˣ

    (-1 , 2):   2 = a * (b)⁻¹ = a/b               a = 2b

    (2 , 54)  54 = a * b²  = 2b * b² = 2b³

    b³ = 54/2 = 27          b = 3

    a = 6

    Function: y = 6 * 3ˣ

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