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2 years ago

4. Please help thanks

Mathematics

2 answers:

antiseptic1488 [7]2 years ago

7 0

I got A I hope this helps

katrin [286]2 years ago

4 0

I got 48(D)

i found this by using pythagorean therom to find the hypotenuse (20) then added them all up (20+16+12) which = 48

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1!+2(2!)+3(3!)+...+n(n!)=(n+1)!-1

anyanavicka [17]

Step-by-step explanation:

OK, let's assume it this way:

Sn=1.1!+2.2!+3.3!+...+n.n!=(2‐1).1!+(3-1).2!+(4-1)3!+...+((n+1)-1).n!

Sn=1.1!+2.2!+3.3!+...+n.n!=(2‐1).1!+(3-1).2!+(4-1)3!+...+((n+1)-1).n!=(2.1!-1!)+(3.2!-2!)+(4.3!-3!)+...+((n-1)n!-n!)=(2!-1!)+(3!-2!)+(4!-3!)+

Sn=1.1!+2.2!+3.3!+...+n.n!=(2‐1).1!+(3-1).2!+(4-1)3!+...+((n+1)-1).n!=(2.1!-1!)+(3.2!-2!)+(4.3!-3!)+...+((n-1)n!-n!)=(2!-1!)+(3!-2!)+(4!-3!)+...+(n+1)!-n!=(n+1)!-1!=(n+1)!-1

and boom problem solved

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1 year ago

Please helppp me I need it now

Aleksandr [31]

Answer:

You can either choose B or D.

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2 years ago

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The volume of a cube is 441cm3. Work out the length of its side rounded to 1 DP.

Rainbow [258]

Answer:

volume of cube=441cm³

l³=441cm³

$\sqrt[3]{441}$

length=7.6cm

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2 years ago

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