(-5/7)^-4*(-5/7)^12={(-5/7)^3}^x*(-5/7)^-1, find the value of x
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Answer:
we know that when base are equal then power will also equal
therefore -4+12=3x+(-1)
=》8=3x-1
=》8+1=3x
=》9=3x
=》9/3=x
=》3=x
hence the x=3
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