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Sveta_85 [38]
3 years ago
13

What is 4f+10f-f= What is (7p+4)-p+2)= What is 5-3j+7+9j+2+

Mathematics
1 answer:
butalik [34]3 years ago
8 0

Answer:

13f

6p+6

14+6j (provided the last symbol is = and not +)

Step-by-step explanation:

the thought is to add like terms

the coefficients the have unknowns (f, p and j) are added together then the constants are added together taking into account the signs

(4+10-1)f = 13f

likewise with the others

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Answer:

6

Step-by-step explanation:

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Solve the following differential equations or initial value problems. In part (a), leave your answer in implicit form. For parts
shepuryov [24]

Answer:

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Step-by-step explanation:

(a) dy/dt = (t^2 + 7)/(y^4 - 4y^3)

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Separate the variables

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(c) (t² + t) dy/dt + y² = ty², y(1) = -1

(t² + t) dy/dt = ty² - y²

(t² + t) dy/dt = y²(t - 1)

(t² + t)/(t - 1)dy/dt = y²

Separating the variables

(t - 1)dt/(t² + t) = dy/y²

tdt/(t² + t) - dt/(t² + t) = dy/y²

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dt/(t + 1) - dt/t + dt/(t + 1) = dy/y²

Integrate both sides

ln(t + 1) - lnt + ln(t + 1) + lnC = -1/y

2ln(t + 1) - lnt + lnC = -1/y

ln|C(t + 1)²/t| = -1/y

y = -1/ln|C(t + 1)²/t|

Apply y(1) = -1

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4C = e^(-1)

C = (1/4)e^(-1) ≈ 0.09

y = -1/ln|0.09(t + 1)²/t|

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Step-by-step explanation:

Example:

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