math

The 2nd and 5th term of G.P are 2/3 and 1/2 respectively.what is the 1st term,the 4th term and the 7th term

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  1. Help me

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  2. Xn = a r^(n-1)
    X2 = a r = 2/3
    X5 = a r^4 = 1/2
    so
    X5/X2 = r^4/r = (1/2)/(2/3)
    r^3 = 3/4
    r= .75^(1/3)

    a r = 2/3
    a [.75^(1/3)] = 2/3
    solve for a which is the first term
    ar^3 = a * (2/3) which is term 4

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  3. 1 WHOLE NUMBER 1 OVER 3

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