Paano mo susuriin ang tiyak na integral int t sqrt (t ^ 2 + 1dt) na hangganan ng [0, sqrt7]?

Paano mo susuriin ang tiyak na integral int t sqrt (t ^ 2 + 1dt) na hangganan ng [0, sqrt7]?
Anonim

Ito ay

# int_0 ^ sqrt7 t * sqrt (t ^ 2 + 1) dt = int_0 ^ sqrt7 1/2 * (t ^ 2 + 1) '* sqrt (t ^ (t ^ 2 + 1) ^ (3/2) / (3/2) 'dt = 1/3 * (t ^ 2 + 1) ^ (3/2) _ 0 ^ sqrt7 = 1/3 (16 sqrt (2) -1) ~~ 7.2091 #

Sagot:

# int_0 ^ sqrt7 tsqrt (t ^ 2 + 1) "" dt = 7.209138999 #

Paliwanag:

Mula sa ibinigay

#int tsqrt (t ^ 2 + 1) "" dt = # bounded by # 0, sqrt7 #

# int_0 ^ sqrt7 tsqrt (t ^ 2 + 1) "" dt = 1 / 2int_0 ^ sqrt7 2t (t ^ 2 + 1) ^ (1/2) "" dt #

# int_0 ^ sqrt7 tsqrt (t ^ 2 + 1) "" dt = 1/3 * (t ^ 2 + 1) ^ (3/2) # mula 0 hanggang # sqrt7 #

# int_0 ^ sqrt7 tsqrt (t ^ 2 + 1) "" dt = 1/3 (sqrt7 ^ 2 + 1) ^ (3/2) - (0 ^ 2 + 1) ^ (3/2) #

# int_0 ^ sqrt7 tsqrt (t ^ 2 + 1) "" dt = 1/3 (8) ^ (3/2) - (+ 1) ^ (3/2) #

# int_0 ^ sqrt7 tsqrt (t ^ 2 + 1) "" dt = 7.209138999 #

Pagpalain ng Diyos … Umaasa ako na ang paliwanag ay kapaki-pakinabang.