Multiple choice

If 4x + 4x + 4x + 4x + 4x + 4x + 4x + 4x = 1 /512, then find the value of (- 3/x)?

  1. 0.50

  2. 0.75

    • 0.50
    • 0.75
    • 4.25
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A Correct answer
Explanation

Given, 4+ 4+ 4x + 4x + 4x + 4x + 4x + 4x  = 1 /512 =>   8 * 4= 2 -9 or 23 *22x  = 2 -9 or 23+2x     = 2-9 or 3 + 2x    = -9          2x      = -12            x       = -6 Therefore,  -3/x = 1/2 = 0 .50