Question 1 Report
The first, second and third terms of an exponential sequence (G.P) are (x - 4), (x + 2), and (3x + 1) respectively. Find the values of x.
Answer Details
U1 = x - 4U2 = x + 2U3 = 3x + 1
u2u1=u3u2
x+2x−4=3x+1x+2
(x+2)(x+2) = (x-4)(3x+1)x2 2 + 4x + 4 = 3x2 - 11x - 4collecting like terms2x2 2 - 15x - 8 =02x2 2 + x - 16x - 8 = 0x(2x + 1) - 8(2x + 1) = 0(x-8)(2x+1) = 0
x = (−12,8 − 1 2 , 8 )
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