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5)b) (-5)^7÷(-5)^3
=(-5)^7-3=( -5)^4=3125
d)(-2/3)^8×(6/5)^8=(-2/3×6/5)^8=(-4/5)^8
c)(15^3)5=(15)^15
e)(-9/7)^16×(-9/7)^0=(-9/7)^16+0=(-9/7)^0
f)(-13/19)^21÷(-13/19)^16=(-13/19)^21-16=(-13/19)^5
6)a)(3/4)^3×(1/3)^2=(3/4)^1×(3/4)^2×(1/3)^2=(3/4)^1×(3/4×1/3)^2=(3/4)^1×(1/4)^2=3/4×14×1/4=3/64
b) after sometime
=(-5)^7-3=( -5)^4=3125
d)(-2/3)^8×(6/5)^8=(-2/3×6/5)^8=(-4/5)^8
c)(15^3)5=(15)^15
e)(-9/7)^16×(-9/7)^0=(-9/7)^16+0=(-9/7)^0
f)(-13/19)^21÷(-13/19)^16=(-13/19)^21-16=(-13/19)^5
6)a)(3/4)^3×(1/3)^2=(3/4)^1×(3/4)^2×(1/3)^2=(3/4)^1×(3/4×1/3)^2=(3/4)^1×(1/4)^2=3/4×14×1/4=3/64
b) after sometime
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