#Functions helppp

39 messages · Page 1 of 1 (latest)

last yarrow
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i don't get the mark scheme second part

supple raftBOT
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last yarrow
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im confused with the alternative method for part 2

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how can inverse function equate to g(1)

last flax
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Since fg(1)=21, so f-1(21)=g(x)

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Or think as fg(x)=y, so f-1(y)=g(x)

last yarrow
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also about the solutions part why does the alternative doesnt have as much solutions as the other one

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a = 9/2 and -23/2

last flax
last yarrow
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is it like the inverse is more strict than the other functions

last flax
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But in this case, it provides some hint 4 u, so is ok to use the alt ii

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Actually I think the alt is much better

last yarrow
lament spearBOT
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@last yarrow has given 1 rep to @last flax

last flax
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U can check ur ans by the alt ii way

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So that only 1 ans left

last yarrow
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equation was a+b = 3

last flax
last yarrow
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is answer not 3 cuz of inverse restricting?

last flax
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Yes

last yarrow
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ohhh

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but the solutions that are not restricted by inverse are valid ones right?

last flax
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Actually not valid

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If u put it into the inverse it would be wrong

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So not acceptable

last yarrow
last flax
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Yes

last yarrow
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is there any other way to check the answers without inverse

last flax
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It's depend on the question

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Hard to tell

last yarrow