help meeee please math

[sisi19]

salam 3likoum lkhawa rabi yastarkoum nasha9 t3awnouni

3awnouni fal wadifa sahitou
o minha twajdou rohkoum lal foroud 2


nabda aya bism Allah


NADA3

A=1/rac *(n+1)+nrac(n+1)


ATBITH ANA




A=1/racn na9is 1/rac(n+1)



ISTANTIDJ EL MAJMOU3


S=1/2RAC1 +1RAC2 PLUS 1/3RAC2 +2RAC3 PLUS ......PLUS 1/100RAC99 +99RAC100

MOLAHADA

RAC= DJIDR

 

[waba]

wlh mkdrt nhlou drk bsh nchlh njiblk lhal
​

 

[sisi19]

sahiti rabbi ykhalik
mardi nasha9o sinon lak3ik3a nchofha doublée:scared:
:sad::sad::sad::sadwalk::sadwalk::sadwalk::sadwalk::sad::sad::sad:

 

[sisi19]

svp hada howa tamrin fel milaf lmorfa9 merci d'avance

 

[صـ كحرفـ محفور ـامتة]

ما فهمت والو ..؟
إذا تقدري اكتبيه بالعربية