logarithm

[hot osprey]

task 1.122
how to i solve it by using a sign form (something like on the photo below).
thanks.

[lime oriole]

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[raven rampart]

if we have $\frac ab>0$, what can we simplify this to

[exotic schooner]

!𒐪 ɹɐupoɯ⇂ㄥ8𝟝 𒐪!

[hot osprey]

i am not sure

@raven rampart

[raven rampart]

have you never seen this sort of inequality before

[hot osprey]

b cant be 0

and a cant be 0

[raven rampart]

you can multiply both sides by b (provided it’s not 0)

getting a>0

remember this

so a>0, b≠0

[hot osprey]

but if we multiply on the other side

dont we have to turn this around >

this: “>”

[raven rampart]

oh yea if b is negative it flips

[hot osprey]

+close