V rog mult ajutati-ma e cu suma aia lui Gauss:
efectuati:
a) x²+2x²+3x²+...+10x²-2x-4x-6x-...-20x=
b)5a+10a+15a+...+60a+3b+6b+9b+...+3b=
c)(4x-b²)+(8x-2b²)+(12x-3b²)+(16x-4b²)+(20x-5b²)=

vA ROG AJUTATI-MA!!

1

Răspunsuri

2014-02-16T20:32:19+02:00
A) (10x²*11x²)/2- 2(10x*11X)/2= 55x²-110x