Question

高二数学题！！！！在线等！！

①64^（-1/3）-（-7/8）^0+16^0.75+0.25^1/2
②（1g5)^2+1g5.1g4+（1g2）^2

要具体步骤！！！

Answer 1

①64^（-1/3）-（-7/8）^0+16^0.75+0.25^1/2
=1/4-1+16^3/4+0.5
=1/4-1+8+0.5
=7.75
②（1g5)^2+1g5.1g4+（1g2）^2
=（1g5)^2+1g5.1g2^2+（1g2）^2
=（1g5)^2+21g5.1g2+（1g2）^2
=(lg5+lg2)^2
=[lg(5*2)]^2
=(lg10)^2
=1

Answer 2

1)1/4-1+8+1/2=7.75
2)g是什么？

Answer 3

①64^（-1/3）-（-7/8）^0+16^0.75+0.25^1/2
(4^3)^(-1/3)-1+(2^4)^(3/4)+(1/4)^(1/2)
=1/4-1+8+1/2=8+1/4=33/4
②（1g5)^2+1g5.1g4+（1g2）^2
=（1g5)^2+21g5.1g2+（1g2）^2
=(lg2+lg5)^2
=1

Answer 4

①64^（-1/3）-（-7/8）^0+16^0.75+0.25^1/2
=1/4-1+8+1/2
=7（3/4）
=7.75

②（1g5)^2+1g5.1g4+（1g2）^2
=（1g5)^2+21g5.1g2+（1g2）^2
=(lg2+lg5)^2
=1