X-അക്ഷത്തിലെ ബിന്ദുവിന്റെ (2, 3) പ്രതിഫലനം ഇതാണ്:

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RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 1)
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  1. (−2, 3)
  2. (2, −3)
  3. (−2, −3)
  4. (3, 2)

Answer (Detailed Solution Below)

Option 2 : (2, −3)
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നൽകിയത്:

നൽകിയിരിക്കുന്ന ബിന്ദു = (2, 3)

ഉപയോഗിച്ച ആശയം:

x-അക്ഷത്തിൽ ഒരു ബിന്ദു പ്രതിഫലിക്കുമ്പോൾ, x-സൂചകപദം  അതേപടി നിലനിൽക്കുകയും y-സൂചകപദം മാത്രം മാറുകയും  ചെയ്യുന്നു.

കണക്കുകൂട്ടൽ:

(2, 3) ആദ്യ ചതുര്‍ത്ഥാംശം ആയതിനാൽ ഈ ബിന്ദുവിന്റെ പ്രതിഫലനം നാലാമത്തെ  ചതുര്‍ത്ഥാംശത്തിൽ ആയിരിക്കും. അതിനാൽ x സൂചകപദം അതേപടി നിലനിൽക്കുകയും y സൂചകപദം -3 ആകുകയും ചെയ്യും.

അതിനാൽ, പ്രതിഫലന ബിന്ദു (2, -3) ആണ്.

∴ പ്രതിഫലന ബിന്ദു (2, -3) ആണ്.

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