how to find the value of the 2x-2x³+7 using the given value for x. 1) x=2. 2) x=-1 3) x=0
Answers
Answered by
55
2x - 2x³ + 7
i) If the value of x is = 2
Putting the value of x
= 2 × 2 - 2.(2)³ + 7
= 4 - 2.8 + 7
= 4 - 16 + 7
= - 5
Hence, the value is - 5
ii) If the value of x is = - 1
Putting the value of x
= 2 × (-1) - 2.(-1)³ + 7
= - 2 - 2.(-1) + 7
= - 2 + 2 + 7
= 7
Hence, the value is 7
iii) If the value of x is 0
Putting the value of x
= 2 × 0 - 2.(0)³ + 7
= 0 - 0 + 7
= 7
Hence, the value is 7
Answered by
17
f(x) =2x - 2x^3 +7
f(x) = 2x( 1 - x^2) +7
f( x) = 2x( 1-x)(1+x) +7
f(2) = 2(2)(1-2)(1+2)+7
= -12+ 7
= -5
f(-1)= 2(-1)(1+1)( 1-1) +7
= 7
f(0) = 2(0)+ 7
= 7
⭐Don't ask stupid Questions⭐
Similar questions