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If (f(x)=2x^2-1), what is (f(-2))?यदि (f(x)=2x^2-1), तो (f(-2)) क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (7)(7)
Step 1: Put (x=-2). Step 2: (f(-2)=2(-2)^2-1=2\cdot4-1=7). Step 3: The square of a negative number is positive.चरण 1: (x=-2) रखें। चरण 2: (f(-2)=2(-2)^2-1=2\cdot4-1=7)। चरण 3: ऋणात्मक संख्या का वर्ग धनात्मक होता है।
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