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3
36. If a, b, c are pth, qth and rth terms respectively of a G.P, then prove that
log a p 1
log b q 1
ba
1 = 0
log c r 1
OR
2 -3 5
If A = 3 2 -4 then find A-1
1 1 -2
Using A-1, solve the following system of equations :
2x - 3y + 5z = 11
3x + 2y – 4z = -5
x + y - 2z = -3


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