Question

Find the value of the expression.
125a^0 b^4 for a= 5/7 , b=− 1/5

Answer 1

Substitute the values of a nad b to the expression:

`125a^0b^4=(125)\left((5)/(7)\right)^0\left(-(1)/(5)\right)^4=(125)(1)\left((1^4)/(5^4)\right)\\\\=(125)\left((1)/(625)\right)=(125)/(625)=(125:125)/(625:125)=(1)/(5)`