sweetescobar
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#1
Report Thread starter 1 month ago
#1
 f:x --> 2x^2 + 8x - 10
for the domain
 x  >= k,

find the least value of k for which f is one-one.

I don't understand how to do this...
Last edited by sweetescobar; 1 month ago
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lord shimada
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#2
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sketch the f(x) and x=-k should help
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lord shimada
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#3
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also since its a quadratic it has a TURNING POINT somewhere and it has to be one to one
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sweetescobar
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#4
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I drew the graph, but I still don't know what exactly to do...
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lord shimada
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#5
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(Original post by sweetescobar)
I drew the graph, but I still don't know what exactly to do...
turning point is very important must be from the right of there to be 1 to 1
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