∑ (I) Dacă A = 1, să se determine natura seriei cu termeni pozitivi rezultate.

(II) Daca A = (-1)^(n+1), sa se cerceteze natura seriei studiate.

(III) Să se precizeze dacă seria alternată de la (II) este absolut convergentă sau

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

4.

step-by-step explanation:

it have the same area.brainliest

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.