(2t+1)^(1/2) => 1/2(2t+1)^(-1/2) => 1 /(2√(2t+1))
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d/dt [ (2t+1)^(1/2) ]
. . . apply the chain rule
1/2 * d/dt [ 2t + 1 ] * (2t + 1)^(-1/2)
. . . d/dt 2t+1 = 2
1/2 * 2 * (2t + 1)^(-1/2)
(2t + 1)^(-1/2)
1 / (2t + 1)^(1/2)
1 / sqrt(2t + 1)
. . . apply the chain rule
1/2 * d/dt [ 2t + 1 ] * (2t + 1)^(-1/2)
. . . d/dt 2t+1 = 2
1/2 * 2 * (2t + 1)^(-1/2)
(2t + 1)^(-1/2)
1 / (2t + 1)^(1/2)
1 / sqrt(2t + 1)
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(√(2t+1))`=½ * 1/√(2t+1) *(2t+1)`=½ * 1/√(2t+1) *2= 1/√(2t+1)