F1 mathz~

1.Which of the following is not ture:
A.a^5/a
=a^(5-1)
=a^4
∴it is true.
B.(3m^3)^4
=(27m^3)^4
=531441m^12
≠3m^12
∴it is wrong.
C.(a^7)^3
=a^(7x3)
=a^21
∴it is true.
D.2k^2x3k^3x4k^4
=(2x3x4)k^(2+3+4)
=24k^9
∴it is true.
∴the answer is B.

2.The line 2y-x+3=0 meets the x-axis at:
2y-x+3=0
Sub y=0 into the equation,
2(0)-x+3=0
-x+3=0
x=3
∴x=3,y=0
∴the answer is C.(3,0)

1B and 2C

^^

1.A a^5/a = a^(5-1)
=a^4
B.(3m^3)^4=81m^12
C.(a^7)^3 =a^(7x3)
=a^21
D.2k^2x3k^3x4k^4=(2x3x4)k^(2+3+4)
=24k^9
b is not ture.
2.Sub y=0 into 2y-x+3=0
x=3
so (3,0)

1B
2C