f(x) = 4x + 3 எனில், f o f o f(-1) எதற்குச் சமம்?

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Answer (Detailed Solution Below)

Option 1 : -1
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கோட்பாடு:

எந்த இரண்டு செயல்பாடுகளுக்கும் f மற்றும் g, f o g என்பது f[g(x)] என வரையறுக்கப்படுகிறது.

கணக்கீடு:

கொடுக்கப்பட்டவை,

f(x) = 4x + 3

மேலே உள்ள கருத்தைப் பயன்படுத்தி

⇒ fof(x) = 4(4x + 3) + 3

⇒ fof(x) = 16x + 15

மீண்டும் அதே கருத்தை பயன்படுத்தி

⇒ fofof(x) = 16(4x + 3) + 15

⇒ fofof(x) = 64x + 63

மேலே உள்ள செயல்பாட்டில் x = -1 ஐ வைக்கவும்

⇒ fofof(-1) = 64(-1) + 63 = -1

∴ f o f o f(-1) என்பது -1க்கு சமம். 

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