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If (p(x)=5x-4), what is the value of (p(3)-p(-1))?यदि (p(x)=5x-4), तो (p(3)-p(-1)) का मान क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 2020
p(3)=5×3−4=11 and p(−1)=5×(−1)−4=−9. Therefore, p(3)−p(−1)=11−(−9)=20. The value 15 is only 5×3; it does not account for the constant term −4 or the value of p(−1). Exam tip: Use brackets when subtracting a negative number, since −(−9)=+9.p(3)=5×3−4=11 और p(−1)=5×(−1)−4=−9। अतः p(3)−p(−1)=11−(−9)=20। 15 केवल 5×3 है, लेकिन इसमें स्थिर पद −4 और p(−1) का मान शामिल नहीं है। परीक्षा टिप: ऋणात्मक मान घटाते समय कोष्ठक लगाकर लिखें, क्योंकि −(−9)=+9 होता है।
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