Question
Function
Evaluate the derivative
Find the domain
Find the x-intercept/zero
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a′(x)=25x4−2x+1−15x2
Evaluate
a(x)=5x5−2x2+x+2−5x3+x2
Simplify
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Evaluate
5x5−2x2+x+2−5x3+x2
Add the terms
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Evaluate
−2x2+x2
Collect like terms by calculating the sum or difference of their coefficients
(−2+1)x2
Add the numbers
−x2
5x5−x2+x+2−5x3
a(x)=5x5−x2+x+2−5x3
Take the derivative of both sides
a′(x)=dxd(5x5−x2+x+2−5x3)
Use differentiation rule dxd(f(x)±g(x))=dxd(f(x))±dxd(g(x))
a′(x)=dxd(5x5)−dxd(x2)+dxd(x)+dxd(2)−dxd(5x3)
Calculate
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Calculate
dxd(5x5)
Use differentiation rule dxd(cf(x))=c×dxd(f(x))
5×dxd(x5)
Use dxdxn=nxn−1 to find derivative
5×5x4
Multiply the terms
25x4
a′(x)=25x4−dxd(x2)+dxd(x)+dxd(2)−dxd(5x3)
Use dxdxn=nxn−1 to find derivative
a′(x)=25x4−2x+dxd(x)+dxd(2)−dxd(5x3)
Use dxdxn=nxn−1 to find derivative
a′(x)=25x4−2x+1+dxd(2)−dxd(5x3)
Use dxd(c)=0 to find derivative
a′(x)=25x4−2x+1+0−dxd(5x3)
Calculate
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Calculate
dxd(5x3)
Use differentiation rule dxd(cf(x))=c×dxd(f(x))
5×dxd(x3)
Use dxdxn=nxn−1 to find derivative
5×3x2
Multiply the terms
15x2
a′(x)=25x4−2x+1+0−15x2
Solution
a′(x)=25x4−2x+1−15x2
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