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Find d^2y/dx^2 for y=4x^4−3x^3−6x^2+x

d^2y/dx^2 = 48x^2 - 18x -12
JL
Answered by John L. • Maths tutor
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7^6 x 7^3

7^9
JL
Answered by John L. • Maths tutor
3800 Views

Simplify: 3l^2mn+nl^2m−5mn^2l+l^2nm+2n^2ml−mn^2

mn(5l^2-3nl-n)
JL
Answered by John L. • Maths tutor
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ln(2x^2 + 9x – 5) = 1 + ln(x^2 + 2x – 15). Express x in terms of e

ln(2x 2 + 9x – 5) = 1 + ln(x 2 + 2x – 15)ln(2x 2 + 9x – 5) – ln(x 2 + 2x – 15)= 1 ln((2x 2 + 9x – 5)/(x 2 + 2x – 15)) = 1(2x 2 + 9x – 5)/(x 2 + 2x – 15) = e(2x – 1)(x + 5)/(x + 5)(x – 3) = e (2x – 1)/(x – 3)...
SF
Answered by Sylvain F. • Maths tutor
5020 Views

express (1+4(root7)) / (5+2(root7)) as a+b(root7), where a and b are integers

1+4(root7) x 5 - 2(root7) 5+2(root7) 5 - 2(root7) 5 - 2(root7) + 20(root7) - (8x7) 25 - (4x7) 5 +18(root7) - 56 -3 -51 + 18(root7) -317 - 6(root7)ie a = 17, b = -6
HB
Answered by Hannah B. • Maths tutor
4470 Views