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CBSE Class 8 Answered

question 5
Asked by bhawan.jha.ac | 20 Jul, 2020, 02:50: PM
Expert Answer
begin mathsize 16px style fraction numerator open square brackets 25 to the power of begin display style 5 over 2 end style end exponent space minus space 25 to the power of 7 over 2 end exponent close square brackets over denominator 25 to the power of 3 over 2 end exponent end fraction
equals fraction numerator open parentheses 5 close parentheses to the power of 2 cross times begin display style 5 over 2 end style end exponent minus space open parentheses 5 close parentheses to the power of 2 cross times 7 over 2 end exponent over denominator open parentheses 5 close parentheses to the power of 2 cross times 3 over 2 end exponent end fraction
equals fraction numerator 5 to the power of 5 minus 5 to the power of 7 space over denominator 5 cubed end fraction
equals fraction numerator 5 to the power of 5 open parentheses 1 minus 5 squared space close parentheses over denominator 5 cubed end fraction
equals 5 squared cross times negative 24
equals space 25 cross times left parenthesis negative 24 right parenthesis
equals negative 600 end style
Answered by Yasmeen Khan | 20 Jul, 2020, 07:24: PM
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