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Determine h(t) given that h^('')(t)=24t^(2)-48 t+2,h(1)=-9 and h(-2)=-4.

Determine h(t) h(t) given that h(t)=24t248t+2,h(1)=9 h^{\prime \prime}(t)=24 t^{2}-48 t+2, h(1)=-9 and h(2)=4 h(-2)=-4 .

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Q. Determine h(t) h(t) given that h(t)=24t248t+2,h(1)=9 h^{\prime \prime}(t)=24 t^{2}-48 t+2, h(1)=-9 and h(2)=4 h(-2)=-4 .
  1. Integrate h(t)h''(t): To find h(t)h(t), we need to integrate h(t)h''(t) twice. The given second derivative is h(t)=24t248t+2h''(t) = 24t^2 - 48t + 2. Let's integrate this to find the first derivative h(t)h'(t).
  2. Find h(t)h'(t): The integral of 24t224t^2 with respect to tt is (24/3)t3=8t3(24/3)t^3 = 8t^3. The integral of 48t-48t with respect to tt is (48/2)t2=24t2(-48/2)t^2 = -24t^2. The integral of 22 with respect to tt is 2t2t. We also add a constant of integration, 24t224t^200. So, 24t224t^211.
  3. Integrate h(t)h'(t) to find h(t)h(t): Now we integrate h(t)h'(t) to find h(t)h(t). The integral of 8t38t^3 with respect to tt is (8/4)t4=2t4(8/4)t^4 = 2t^4. The integral of 24t2-24t^2 with respect to tt is (24/3)t3=8t3(-24/3)t^3 = -8t^3. The integral of h(t)h(t)00 with respect to tt is h(t)h(t)22. We also add another constant of integration, h(t)h(t)33. So, h(t)h(t)44.
  4. Use h(1)=9h(1) = -9: We have two initial conditions: h(1)=9h(1) = -9 and h(2)=4h(-2) = -4. We will use these to solve for the constants C1C_1 and C2C_2. First, let's use h(1)=9h(1) = -9. Plugging in t=1t = 1, we get h(1)=2(1)48(1)3+(1)2+C1(1)+C2=28+1+C1+C2=5+C1+C2h(1) = 2(1)^4 - 8(1)^3 + (1)^2 + C_1(1) + C_2 = 2 - 8 + 1 + C_1 + C_2 = -5 + C_1 + C_2. Since h(1)=9h(1) = -9, we have 5+C1+C2=9-5 + C_1 + C_2 = -9.
  5. Use h(2)=4h(-2) = -4: Now let's use h(2)=4h(-2) = -4. Plugging in t=2t = -2, we get h(2)=2(2)48(2)3+(2)2+C1(2)+C2=32+64+42C1+C2=1002C1+C2h(-2) = 2(-2)^4 - 8(-2)^3 + (-2)^2 + C_1(-2) + C_2 = 32 + 64 + 4 - 2C_1 + C_2 = 100 - 2C_1 + C_2. Since h(2)=4h(-2) = -4, we have 1002C1+C2=4100 - 2C_1 + C_2 = -4.
  6. Solve system of equations: We now have a system of two equations:\newline11) 5+C1+C2=9-5 + C_1 + C_2 = -9\newline22) 1002C1+C2=4100 - 2C_1 + C_2 = -4\newlineLet's solve this system for C1C_1 and C2C_2.
  7. Subtract equations to eliminate C2C_2: Subtract equation 11) from equation 22) to eliminate C2C_2:
    (1002C1+C2)(5+C1+C2)=4(9)(100 - 2C_1 + C_2) - (-5 + C_1 + C_2) = -4 - (-9)
    953C1=595 - 3C_1 = 5
    3C1=595-3C_1 = 5 - 95
    3C1=90-3C_1 = -90
    C1=30C_1 = 30
  8. Find C1C_1: Now that we have C1C_1, we can substitute it back into equation 11) to find C2C_2:
    -5+30+C2=95 + 30 + C_2 = -9
    25+C2=925 + C_2 = -9
    C2=925C_2 = -9 - 25
    C2=34C_2 = -34
  9. Find C2C_2: We have found C1=30C_1 = 30 and C2=34C_2 = -34. Now we can write the final form of h(t)h(t):h(t)=2t48t3+t2+30t34.h(t) = 2t^4 - 8t^3 + t^2 + 30t - 34.

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