Question

Please solve question no vii of 2
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Answer 1

Answer:175

Step-by-step explanation:

$(5^{-1-2} * 7^{2-(-4)})^{7/2} *( 5^{-2-3} * 7^{3-(-5)} )^{-5/2}\\ = (5^{-3}*7^{6})^{7/2}*(5^{-5}*7^{8})^{-5/2}\\=(5^{-3*7/2}* 7^{6*7/2})*(5^{-5*-5/2}*7^{8*-5/2} \\=(5^{ -21/2 }*7^{21})*5^{25/2}*7^{ -20 } \\= (5^{-21/2 + 25/2}*7^{21 + (-20)} \\= 5^{2}*7^{1} \\=25*7\\=175$