几道初一的题(是积的乘方和幂的乘方).
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几道初一的题(是积的乘方和幂的乘方).
①-8^1994(1994次方,以下都这样表示)×(-0.125)^1995
②[(-X)^2N]^2×X^M+(-2X^M)^3
③{-A^3×[-a^2(-a^4)^2]^2}^2
④3(X^2)^2×(X^2)-(X^5)^2×(X^2)^2
①-8^1994(1994次方,以下都这样表示)×(-0.125)^1995
②[(-X)^2N]^2×X^M+(-2X^M)^3
③{-A^3×[-a^2(-a^4)^2]^2}^2
④3(X^2)^2×(X^2)-(X^5)^2×(X^2)^2
①-8^1994(1994次方,以下都这样表示)×(-0.125)^1995
=8^1994*0.125^1994*0.125
=(8*0.125)^1994*0.125
=1^1994*0.125=0.125
②[(-X)^2N]^2×X^M+(-2X^M)^3
=[x^2n]^2*x^m-8x^3m
=x^(4n+m)-8x^3m
③{-A^3×[-a^2(-a^4)^2]^2}^2
={-A^3×[-a^2*a^8]^2}^2
={-A^3×[-a^10]^2}^2
={-A^3×a^20}^2
={-A^23}^2
=a^46
④3(X^2)^2×(X^2)-(X^5)^2×(X^2)^2
=3X^4×(X^2)-X^10×X^4
=3x^6-x^14
=8^1994*0.125^1994*0.125
=(8*0.125)^1994*0.125
=1^1994*0.125=0.125
②[(-X)^2N]^2×X^M+(-2X^M)^3
=[x^2n]^2*x^m-8x^3m
=x^(4n+m)-8x^3m
③{-A^3×[-a^2(-a^4)^2]^2}^2
={-A^3×[-a^2*a^8]^2}^2
={-A^3×[-a^10]^2}^2
={-A^3×a^20}^2
={-A^23}^2
=a^46
④3(X^2)^2×(X^2)-(X^5)^2×(X^2)^2
=3X^4×(X^2)-X^10×X^4
=3x^6-x^14