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Question
Evaluate :
`7^0 xx (25)^(-3/2) - 5^(-3)`
Solution
`7^0 xx (25)^(-3/2) - 5^(-3)`
= `7^0 xx ( 5 xx 5 )^( -3/2 ) - 5^( -3 )`
= `7^0 xx (5^2)^(-3/2) - 1/5^3`
= `7^0 xx [(5)^[2 xx (-3/2)]] - 1/5^3`
= `7^0 xx 5^(-3) - 1/5^3`
= `1 xx 5^(-3)- 1/5^3`
= `1/5^3 - 1/5^3`
= `[ 1 - 1 ]/[ 5 xx 5 xx 5 ]`
= `0/125`
= 0
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