Question

4. Calculati:
a) 1^3 +2^3 +3^3 +4^3 =
b) 5^3+0^3+7^3=
c) 1^3+9^3+11^3=
d) 1^4+2^4+3^4+4^4=​

Answer 1

Răspuns:

$a)\: 1^3 +2^3 +3^3 +4^3 = 1 + 8 + 27+ 64 = \boxed{100}$

b)

$5^3+0^3+7^3 = 125 +0 +343= \boxed{468}$

c)

$1^3+9^3+11^3 = 1 +729+1331 = \boxed{2061}$

d)

$1^4+2^4+3^4+4^4 = 1+16+81+256 = \boxed{354}$

Answer 2

Răspuns:

Explicație pas cu pas:

a) 1^3+2^3+3^3+4^3=1+8+27+64=9+91=100

b)5^3+0^3+7^3=124+0+343=467

c)1^3+9^3+11^3=1+729+1 331=730+1 331=2 061

d)1^4+2^4+3^4+4^4=1+16+81+256=17+337=354