Operations for functions: Inverse functions
Injective functions
The graph of the function #2\cdot x^3-7\cdot x+4# of #x# is drawn in the figure below.
Determine the two numbers #a# and #b# such that the set of all #x# with #a\le x\le b# is the biggest closed interval on which #f# is decreasing. Your answer should be of the form #\rv{a,b}#, with #a# and #b# rounded with a precision to a single decimal.
Determine the two numbers #a# and #b# such that the set of all #x# with #a\le x\le b# is the biggest closed interval on which #f# is decreasing. Your answer should be of the form #\rv{a,b}#, with #a# and #b# rounded with a precision to a single decimal.
| #\rv{a,b}=# |
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