Callisto
  • Callisto
If f(x) is divisible by 2x+3, then f(x+1) is divisible by?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
2x + 5? hehe just guessing
Callisto
  • Callisto
i forgot, I just suddenly remember this type of question and I cannot solve it..
anonymous
  • anonymous
1

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More answers

anonymous
  • anonymous
2(x+1) + 3 ?
anonymous
  • anonymous
From the given information, f(x) = (2x+3) Q(x) so, f(x+1) = (2x+5) Q(x+1)
anonymous
  • anonymous
So, Ishaan is right.
apoorvk
  • apoorvk
Yeah Ishaan, I would have guessed the same.
Callisto
  • Callisto
Alright , i don't understand. What about if f(x) is divisible by x-1, which of the following must be a factor of f(2x+1) ? A. x B . x-3 C. 2x-1 D. 2x+1 This time.. I've got the answer for this one , but i don't know how to solve it
anonymous
  • anonymous
A
anonymous
  • anonymous
same method.
anonymous
  • anonymous
Let \( f (x) = (x - 1) Q (x)\), then \[ f (2x + 1) = (2x + 1 - 1) Q (2x + 1)= 2x Q (2x + 1) \] Hence x is a factor of f (2x + 1). (Ans: A)
Callisto
  • Callisto
Oh this time i understand, thanks!!!
anonymous
  • anonymous
I am glad you did.
anonymous
  • anonymous
Time for the problem of the day guys! ;)
Callisto
  • Callisto
right, for the first one i don't understand i thought f(x) = (2x+3) Q(x) f(x+1) = (2x+3 +1) Q(x+1) = 2(x+1) Q(x+1) ?
Mani_Jha
  • Mani_Jha
When you find f(x+1), you just substitute x+1 instead of x. No other changes in that. Just like to find f(2) you substitute 2 instead of x. So f(x+1)={2(x+1)+3)Q(x+1) ={2x+2+3}Q(x+1) =(2x+5)Q(x+1) Ok?
Callisto
  • Callisto
Yup, thanks a ton!

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