3 years ago

SECTION C

Mathematics

1 answer:

ki77a [65]3 years ago

7 0

Sus hahah shshsh dish

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Show that a/(b+1)-a/(b+1)^2 can be Written as ab/(b+1)^2

diamong [38]

Answer:

see this img

Step-by-step explanation:

img ☻

7 0

3 years ago

Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?

hjlf

$-a^2=(-1)\cdot a\cdot a$

Regardless of the sign of $a$ , we have $a\cdot a=a^2\ge0$ (never negative). But multiplying by -1 makes it negative.

On the other hand,

$(-a)^2=((-1)\cdot a)^2=(-1)^2\cdot a^2=1\cdot a^2=a^2$

which can never be negative for real $a$ .

6 0

3 years ago

An automobile travels past the farmhouse at a speed of v = 45 km/h. How fast is the distance between the automobile and the farm

yulyashka [42]

Answer:

$\frac{ds}{dt} = 39.586 km/h$