∫ 1 2 ( x ⌊ x 2 ⌋ + ⌊ x 2 ⌋ x ) d x
The integral above can be expressed as b a + c + e d + ln h 2 f − 2 g + ln k i − 3 j . What is the sum of all of these constants from a to k ?
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Maybe I'm being stupid, and i know i am, but don't skip 'dx' while writing integrals where you want to integrate w.r.t. x. But i appreciate your effort in writing that solution, because i myself find it hard to write such solutions in LaTeX ;)
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You're not at all being stupid. In fact, without the d x 's, his solution is meaningless (in mathematical contexts).
@Pranjal Jain , care to edit your solution?
Integrate (x+1) from 1 to root 2 + Integrate (x^2 + 2^x) from root 2 to root 3 + Integrate (x^3 + 3^x) from root 3 to 2 Simplify & add Answer is 39
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∫ 1 2 x ⌊ x 2 ⌋ + ⌊ x 2 ⌋ x d x
∫ 1 2 x ⌊ x 2 ⌋ + ⌊ x 2 ⌋ x d x + ∫ 2 3 x ⌊ x 2 ⌋ + ⌊ x 2 ⌋ x d x + ∫ 3 2 x ⌊ x 2 ⌋ + ⌊ x 2 ⌋ x d x
= ∫ 1 2 ( x + 1 ) d x + ∫ 2 3 ( x 2 + 2 x ) d x + ∫ 3 2 x 3 + 3 x d x
= [ 2 x 2 + x ] 1 2 + [ 3 x 3 + l n 2 2 x ] 2 3 + [ 4 x 4 + l n 3 3 x ] 3 2
= 3 2 + 3 + l n 2 2 3 − 2 2 + l n 3 9 − 3 3 + 4 5
Hence answer is 5+4+3+2+3+3+2+2+9+3+3= 3 9