please help thank you
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∫ f(x) (a to b) = F(b)-F(a)
∫ x^3 = x^4/4 + c
∫ x^3 (sqrt(3) to sqrt(5)) = sqrt(5)^4/4 - sqrt(3)^4/4
= 25/4 - 9/4
= 16/4 = 4
∫ x^3 = x^4/4 + c
∫ x^3 (sqrt(3) to sqrt(5)) = sqrt(5)^4/4 - sqrt(3)^4/4
= 25/4 - 9/4
= 16/4 = 4