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Draw the graph of y = x3 − 6x2 − x + 3 for the values of x in the range -2 <= x < 4. Use your graph to find the solutions of the equation x3 − 6x2 − x + 3 = 0.
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Answer
Use the left and right arrow keys to trace the curve, up and down to jump between key points, and plus and minus to zoom.
| Point | x | y |
|---|---|---|
| x-intercept | −0.75 | 0 |
| Maximum | −0.08 | 3.04 |
| y-intercept | 0 | 3 |
| x-intercept | 0.66 | 0 |
Step-by-step solution
3 stepsHili ni swali la kuchora grafu ya mlinganyo wa ujazo na kisha kutumia grafu hiyo kupata suluhisho.
Tengeneza jedwali la thamani za kwa katika kipindi cha .
Hii inamaanisha tutatumia thamani za .
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Kwa :
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Kwa :
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Kwa :
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Kwa :
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Kwa :
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Kwa :
Jedwali la thamani ni:
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Chora grafu.
Panga pointi hizi kwenye ndege ya Cartesian (grafu). Unganisha pointi kwa kutumia mstari laini ili kuunda grafu ya . Hakikisha unatumia mizani inayofaa kwa shoka zote mbili.
Tumia grafu kupata suluhisho za mlinganyo .
Suluhisho za mlinganyo ni sehemu ambapo grafu ya inakata mhimili wa (yaani, ambapo ).
Kutoka kwenye jedwali la thamani:
- Kuna mabadiliko ya ishara ya kutoka () hadi (). Hii inamaanisha kuna suluhisho moja kati ya na .
- Kuna mabadiliko ya ishara ya kutoka () hadi (). Hii inamaanisha kuna suluhisho moja kati ya na .
Kwa kusoma kutoka kwenye grafu iliyochorwa kwa usahihi, utapata suluhisho za takriban:
- Suluhisho la kwanza:
- Suluhisho la pili:
Kumbuka kuwa mlinganyo wa ujazo unaweza kuwa na suluhisho tatu. Hata hivyo, kwa kuzingatia kipindi cha kilichotolewa (), suluhisho mbili tu ndizo zitakazoonekana wazi kwenye grafu yako. Suluhisho la tatu liko nje ya kipindi hiki.
Suluhisho za mlinganyo ni takriban:
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