Question

а^5×а^-6 ÷ а^-9 при а=1,5

Answer 1

${a}^{5} \times {a}^{ - 6} \div {a}^{ - 9} = {a}^{5 - 6 - ( - 9)} = {a}^{8}$
если а=1.5
${a}^{8} = {1.5}^{8} = { \frac{3}{2} }^{2} = \frac{6561}{256} = 25.62891$