Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation. 12 plus StartFraction 12 squared Over 2 EndFraction plus StartFraction 12 cubed Over 3 EndFraction plus midline ellipsis plus StartFraction 12 Superscript n Over n EndFraction12+ 122 2+ 123 3+⋯+ 12n n The summation starts at iequals=1. What is the upper limit of summation and the general term?

40% off the regular price is the correct answer.

step-by-step explanation:

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

40 x 50 = 2000

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!